WordPress 3.0 beta 1 documentation kindly provided to you by Hay Kranen
WordPress 3.0 beta 1 documentation kindly provided to you by Hay Kranen
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PHP Cross Reference of WordPress 3.0 beta 1 |
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1 <?php 2 /** 3 * Main WordPress Formatting API. 4 * 5 * Handles many functions for formatting output. 6 * 7 * @package WordPress 8 **/ 9 10 /** 11 * Replaces common plain text characters into formatted entities 12 * 13 * As an example, 14 * <code> 15 * 'cause today's effort makes it worth tomorrow's "holiday"... 16 * </code> 17 * Becomes: 18 * <code> 19 * ’cause today’s effort makes it worth tomorrow’s “holiday”… 20 * </code> 21 * Code within certain html blocks are skipped. 22 * 23 * @since 0.71 24 * @uses $wp_cockneyreplace Array of formatted entities for certain common phrases 25 * 26 * @param string $text The text to be formatted 27 * @return string The string replaced with html entities 28 */ 29 function wptexturize($text) { 30 global $wp_cockneyreplace; 31 static $static_setup = false, $opening_quote, $closing_quote, $default_no_texturize_tags, $default_no_texturize_shortcodes, $static_characters, $static_replacements, $dynamic_characters, $dynamic_replacements; 32 $output = ''; 33 $curl = ''; 34 $textarr = preg_split('/(<.*>|\[.*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE); 35 $stop = count($textarr); 36 37 // No need to set up these variables more than once 38 if (!$static_setup) { 39 /* translators: opening curly quote */ 40 $opening_quote = _x('“', 'opening curly quote'); 41 /* translators: closing curly quote */ 42 $closing_quote = _x('”', 'closing curly quote'); 43 44 $default_no_texturize_tags = array('pre', 'code', 'kbd', 'style', 'script', 'tt'); 45 $default_no_texturize_shortcodes = array('code'); 46 47 // if a plugin has provided an autocorrect array, use it 48 if ( isset($wp_cockneyreplace) ) { 49 $cockney = array_keys($wp_cockneyreplace); 50 $cockneyreplace = array_values($wp_cockneyreplace); 51 } else { 52 $cockney = array("'tain't","'twere","'twas","'tis","'twill","'til","'bout","'nuff","'round","'cause"); 53 $cockneyreplace = array("’tain’t","’twere","’twas","’tis","’twill","’til","’bout","’nuff","’round","’cause"); 54 } 55 56 $static_characters = array_merge(array('---', ' -- ', '--', ' - ', 'xn–', '...', '``', '\'s', '\'\'', ' (tm)'), $cockney); 57 $static_replacements = array_merge(array('—', ' — ', '–', ' – ', 'xn--', '…', $opening_quote, '’s', $closing_quote, ' ™'), $cockneyreplace); 58 59 $dynamic_characters = array('/\'(\d\d(?:’|\')?s)/', '/(\s|\A|[([{<]|")\'/', '/(\d+)"/', '/(\d+)\'/', '/(\S)\'([^\'\s])/', '/(\s|\A|[([{<])"(?!\s)/', '/"(\s|\S|\Z)/', '/\'([\s.]|\Z)/', '/(\d+)x(\d+)/'); 60 $dynamic_replacements = array('’$1','$1‘', '$1″', '$1′', '$1’$2', '$1' . $opening_quote . '$2', $closing_quote . '$1', '’$1', '$1×$2'); 61 62 $static_setup = true; 63 } 64 65 // Transform into regexp sub-expression used in _wptexturize_pushpop_element 66 // Must do this everytime in case plugins use these filters in a context sensitive manner 67 $no_texturize_tags = '(' . implode('|', apply_filters('no_texturize_tags', $default_no_texturize_tags) ) . ')'; 68 $no_texturize_shortcodes = '(' . implode('|', apply_filters('no_texturize_shortcodes', $default_no_texturize_shortcodes) ) . ')'; 69 70 $no_texturize_tags_stack = array(); 71 $no_texturize_shortcodes_stack = array(); 72 73 for ( $i = 0; $i < $stop; $i++ ) { 74 $curl = $textarr[$i]; 75 76 if ( !empty($curl) && '<' != $curl{0} && '[' != $curl{0} 77 && empty($no_texturize_shortcodes_stack) && empty($no_texturize_tags_stack)) { 78 // This is not a tag, nor is the texturization disabled 79 // static strings 80 $curl = str_replace($static_characters, $static_replacements, $curl); 81 // regular expressions 82 $curl = preg_replace($dynamic_characters, $dynamic_replacements, $curl); 83 } elseif (!empty($curl)) { 84 /* 85 * Only call _wptexturize_pushpop_element if first char is correct 86 * tag opening 87 */ 88 if ('<' == $curl{0}) 89 _wptexturize_pushpop_element($curl, $no_texturize_tags_stack, $no_texturize_tags, '<', '>'); 90 elseif ('[' == $curl{0}) 91 _wptexturize_pushpop_element($curl, $no_texturize_shortcodes_stack, $no_texturize_shortcodes, '[', ']'); 92 } 93 94 $curl = preg_replace('/&([^#])(?![a-zA-Z1-4]{1,8};)/', '&$1', $curl); 95 $output .= $curl; 96 } 97 98 return $output; 99 } 100 101 /** 102 * Search for disabled element tags. Push element to stack on tag open and pop 103 * on tag close. Assumes first character of $text is tag opening. 104 * 105 * @access private 106 * @since 2.9.0 107 * 108 * @param string $text Text to check. First character is assumed to be $opening 109 * @param array $stack Array used as stack of opened tag elements 110 * @param string $disabled_elements Tags to match against formatted as regexp sub-expression 111 * @param string $opening Tag opening character, assumed to be 1 character long 112 * @param string $opening Tag closing character 113 * @return object 114 */ 115 function _wptexturize_pushpop_element($text, &$stack, $disabled_elements, $opening = '<', $closing = '>') { 116 // Check if it is a closing tag -- otherwise assume opening tag 117 if (strncmp($opening . '/', $text, 2)) { 118 // Opening? Check $text+1 against disabled elements 119 if (preg_match('/^' . $disabled_elements . '\b/', substr($text, 1), $matches)) { 120 /* 121 * This disables texturize until we find a closing tag of our type 122 * (e.g. <pre>) even if there was invalid nesting before that 123 * 124 * Example: in the case <pre>sadsadasd</code>"baba"</pre> 125 * "baba" won't be texturize 126 */ 127 128 array_push($stack, $matches[1]); 129 } 130 } else { 131 // Closing? Check $text+2 against disabled elements 132 $c = preg_quote($closing, '/'); 133 if (preg_match('/^' . $disabled_elements . $c . '/', substr($text, 2), $matches)) { 134 $last = array_pop($stack); 135 136 // Make sure it matches the opening tag 137 if ($last != $matches[1]) 138 array_push($stack, $last); 139 } 140 } 141 } 142 143 /** 144 * Accepts matches array from preg_replace_callback in wpautop() or a string. 145 * 146 * Ensures that the contents of a <<pre>>...<</pre>> HTML block are not 147 * converted into paragraphs or line-breaks. 148 * 149 * @since 1.2.0 150 * 151 * @param array|string $matches The array or string 152 * @return string The pre block without paragraph/line-break conversion. 153 */ 154 function clean_pre($matches) { 155 if ( is_array($matches) ) 156 $text = $matches[1] . $matches[2] . "</pre>"; 157 else 158 $text = $matches; 159 160 $text = str_replace('<br />', '', $text); 161 $text = str_replace('<p>', "\n", $text); 162 $text = str_replace('</p>', '', $text); 163 164 return $text; 165 } 166 167 /** 168 * Replaces double line-breaks with paragraph elements. 169 * 170 * A group of regex replaces used to identify text formatted with newlines and 171 * replace double line-breaks with HTML paragraph tags. The remaining 172 * line-breaks after conversion become <<br />> tags, unless $br is set to '0' 173 * or 'false'. 174 * 175 * @since 0.71 176 * 177 * @param string $pee The text which has to be formatted. 178 * @param int|bool $br Optional. If set, this will convert all remaining line-breaks after paragraphing. Default true. 179 * @return string Text which has been converted into correct paragraph tags. 180 */ 181 function wpautop($pee, $br = 1) { 182 183 if ( trim($pee) === '' ) 184 return ''; 185 $pee = $pee . "\n"; // just to make things a little easier, pad the end 186 $pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee); 187 // Space things out a little 188 $allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|option|form|map|area|blockquote|address|math|style|input|p|h[1-6]|hr|fieldset|legend)'; 189 $pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee); 190 $pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee); 191 $pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines 192 if ( strpos($pee, '<object') !== false ) { 193 $pee = preg_replace('|\s*<param([^>]*)>\s*|', "<param$1>", $pee); // no pee inside object/embed 194 $pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee); 195 } 196 $pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates 197 // make paragraphs, including one at the end 198 $pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY); 199 $pee = ''; 200 foreach ( $pees as $tinkle ) 201 $pee .= '<p>' . trim($tinkle, "\n") . "</p>\n"; 202 $pee = preg_replace('|<p>\s*</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace 203 $pee = preg_replace('!<p>([^<]+)</(div|address|form)>!', "<p>$1</p></$2>", $pee); 204 $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag 205 $pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem with nested lists 206 $pee = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee); 207 $pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee); 208 $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee); 209 $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); 210 if ($br) { 211 $pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', create_function('$matches', 'return str_replace("\n", "<WPPreserveNewline />", $matches[0]);'), $pee); 212 $pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee); // optionally make line breaks 213 $pee = str_replace('<WPPreserveNewline />', "\n", $pee); 214 } 215 $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee); 216 $pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee); 217 if (strpos($pee, '<pre') !== false) 218 $pee = preg_replace_callback('!(<pre[^>]*>)(.*?)</pre>!is', 'clean_pre', $pee ); 219 $pee = preg_replace( "|\n</p>$|", '</p>', $pee ); 220 221 return $pee; 222 } 223 224 /** 225 * Don't auto-p wrap shortcodes that stand alone 226 * 227 * Ensures that shortcodes are not wrapped in <<p>>...<</p>>. 228 * 229 * @since 2.9.0 230 * 231 * @param string $pee The content. 232 * @return string The filtered content. 233 */ 234 function shortcode_unautop($pee) { 235 global $shortcode_tags; 236 237 if ( !empty($shortcode_tags) && is_array($shortcode_tags) ) { 238 $tagnames = array_keys($shortcode_tags); 239 $tagregexp = join( '|', array_map('preg_quote', $tagnames) ); 240 $pee = preg_replace('/<p>\\s*?(\\[(' . $tagregexp . ')\\b.*?\\/?\\](?:.+?\\[\\/\\2\\])?)\\s*<\\/p>/s', '$1', $pee); 241 } 242 243 return $pee; 244 } 245 246 /** 247 * Checks to see if a string is utf8 encoded. 248 * 249 * NOTE: This function checks for 5-Byte sequences, UTF8 250 * has Bytes Sequences with a maximum length of 4. 251 * 252 * @author bmorel at ssi dot fr (modified) 253 * @since 1.2.1 254 * 255 * @param string $str The string to be checked 256 * @return bool True if $str fits a UTF-8 model, false otherwise. 257 */ 258 function seems_utf8($str) { 259 $length = strlen($str); 260 for ($i=0; $i < $length; $i++) { 261 $c = ord($str[$i]); 262 if ($c < 0x80) $n = 0; # 0bbbbbbb 263 elseif (($c & 0xE0) == 0xC0) $n=1; # 110bbbbb 264 elseif (($c & 0xF0) == 0xE0) $n=2; # 1110bbbb 265 elseif (($c & 0xF8) == 0xF0) $n=3; # 11110bbb 266 elseif (($c & 0xFC) == 0xF8) $n=4; # 111110bb 267 elseif (($c & 0xFE) == 0xFC) $n=5; # 1111110b 268 else return false; # Does not match any model 269 for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ? 270 if ((++$i == $length) || ((ord($str[$i]) & 0xC0) != 0x80)) 271 return false; 272 } 273 } 274 return true; 275 } 276 277 /** 278 * Converts a number of special characters into their HTML entities. 279 * 280 * Specifically deals with: &, <, >, ", and '. 281 * 282 * $quote_style can be set to ENT_COMPAT to encode " to 283 * ", or ENT_QUOTES to do both. Default is ENT_NOQUOTES where no quotes are encoded. 284 * 285 * @since 1.2.2 286 * 287 * @param string $string The text which is to be encoded. 288 * @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES. 289 * @param string $charset Optional. The character encoding of the string. Default is false. 290 * @param boolean $double_encode Optional. Whether to encode existing html entities. Default is false. 291 * @return string The encoded text with HTML entities. 292 */ 293 function _wp_specialchars( $string, $quote_style = ENT_NOQUOTES, $charset = false, $double_encode = false ) { 294 $string = (string) $string; 295 296 if ( 0 === strlen( $string ) ) { 297 return ''; 298 } 299 300 // Don't bother if there are no specialchars - saves some processing 301 if ( !preg_match( '/[&<>"\']/', $string ) ) { 302 return $string; 303 } 304 305 // Account for the previous behaviour of the function when the $quote_style is not an accepted value 306 if ( empty( $quote_style ) ) { 307 $quote_style = ENT_NOQUOTES; 308 } elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) { 309 $quote_style = ENT_QUOTES; 310 } 311 312 // Store the site charset as a static to avoid multiple calls to wp_load_alloptions() 313 if ( !$charset ) { 314 static $_charset; 315 if ( !isset( $_charset ) ) { 316 $alloptions = wp_load_alloptions(); 317 $_charset = isset( $alloptions['blog_charset'] ) ? $alloptions['blog_charset'] : ''; 318 } 319 $charset = $_charset; 320 } 321 if ( in_array( $charset, array( 'utf8', 'utf-8', 'UTF8' ) ) ) { 322 $charset = 'UTF-8'; 323 } 324 325 $_quote_style = $quote_style; 326 327 if ( $quote_style === 'double' ) { 328 $quote_style = ENT_COMPAT; 329 $_quote_style = ENT_COMPAT; 330 } elseif ( $quote_style === 'single' ) { 331 $quote_style = ENT_NOQUOTES; 332 } 333 334 // Handle double encoding ourselves 335 if ( !$double_encode ) { 336 $string = wp_specialchars_decode( $string, $_quote_style ); 337 338 /* Critical */ 339 // The previous line decodes &phrase; into &phrase; We must guarantee that &phrase; is valid before proceeding. 340 $string = wp_kses_normalize_entities($string); 341 342 // Now proceed with custom double-encoding silliness 343 $string = preg_replace( '/&(#?x?[0-9a-z]+);/i', '|wp_entity|$1|/wp_entity|', $string ); 344 } 345 346 $string = @htmlspecialchars( $string, $quote_style, $charset ); 347 348 // Handle double encoding ourselves 349 if ( !$double_encode ) { 350 $string = str_replace( array( '|wp_entity|', '|/wp_entity|' ), array( '&', ';' ), $string ); 351 } 352 353 // Backwards compatibility 354 if ( 'single' === $_quote_style ) { 355 $string = str_replace( "'", ''', $string ); 356 } 357 358 return $string; 359 } 360 361 /** 362 * Converts a number of HTML entities into their special characters. 363 * 364 * Specifically deals with: &, <, >, ", and '. 365 * 366 * $quote_style can be set to ENT_COMPAT to decode " entities, 367 * or ENT_QUOTES to do both " and '. Default is ENT_NOQUOTES where no quotes are decoded. 368 * 369 * @since 2.8 370 * 371 * @param string $string The text which is to be decoded. 372 * @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old _wp_specialchars() values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES. 373 * @return string The decoded text without HTML entities. 374 */ 375 function wp_specialchars_decode( $string, $quote_style = ENT_NOQUOTES ) { 376 $string = (string) $string; 377 378 if ( 0 === strlen( $string ) ) { 379 return ''; 380 } 381 382 // Don't bother if there are no entities - saves a lot of processing 383 if ( strpos( $string, '&' ) === false ) { 384 return $string; 385 } 386 387 // Match the previous behaviour of _wp_specialchars() when the $quote_style is not an accepted value 388 if ( empty( $quote_style ) ) { 389 $quote_style = ENT_NOQUOTES; 390 } elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) { 391 $quote_style = ENT_QUOTES; 392 } 393 394 // More complete than get_html_translation_table( HTML_SPECIALCHARS ) 395 $single = array( ''' => '\'', ''' => '\'' ); 396 $single_preg = array( '/�*39;/' => ''', '/�*27;/i' => ''' ); 397 $double = array( '"' => '"', '"' => '"', '"' => '"' ); 398 $double_preg = array( '/�*34;/' => '"', '/�*22;/i' => '"' ); 399 $others = array( '<' => '<', '<' => '<', '>' => '>', '>' => '>', '&' => '&', '&' => '&', '&' => '&' ); 400 $others_preg = array( '/�*60;/' => '<', '/�*62;/' => '>', '/�*38;/' => '&', '/�*26;/i' => '&' ); 401 402 if ( $quote_style === ENT_QUOTES ) { 403 $translation = array_merge( $single, $double, $others ); 404 $translation_preg = array_merge( $single_preg, $double_preg, $others_preg ); 405 } elseif ( $quote_style === ENT_COMPAT || $quote_style === 'double' ) { 406 $translation = array_merge( $double, $others ); 407 $translation_preg = array_merge( $double_preg, $others_preg ); 408 } elseif ( $quote_style === 'single' ) { 409 $translation = array_merge( $single, $others ); 410 $translation_preg = array_merge( $single_preg, $others_preg ); 411 } elseif ( $quote_style === ENT_NOQUOTES ) { 412 $translation = $others; 413 $translation_preg = $others_preg; 414 } 415 416 // Remove zero padding on numeric entities 417 $string = preg_replace( array_keys( $translation_preg ), array_values( $translation_preg ), $string ); 418 419 // Replace characters according to translation table 420 return strtr( $string, $translation ); 421 } 422 423 /** 424 * Checks for invalid UTF8 in a string. 425 * 426 * @since 2.8 427 * 428 * @param string $string The text which is to be checked. 429 * @param boolean $strip Optional. Whether to attempt to strip out invalid UTF8. Default is false. 430 * @return string The checked text. 431 */ 432 function wp_check_invalid_utf8( $string, $strip = false ) { 433 $string = (string) $string; 434 435 if ( 0 === strlen( $string ) ) { 436 return ''; 437 } 438 439 // Store the site charset as a static to avoid multiple calls to get_option() 440 static $is_utf8; 441 if ( !isset( $is_utf8 ) ) { 442 $is_utf8 = in_array( get_option( 'blog_charset' ), array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ); 443 } 444 if ( !$is_utf8 ) { 445 return $string; 446 } 447 448 // Check for support for utf8 in the installed PCRE library once and store the result in a static 449 static $utf8_pcre; 450 if ( !isset( $utf8_pcre ) ) { 451 $utf8_pcre = @preg_match( '/^./u', 'a' ); 452 } 453 // We can't demand utf8 in the PCRE installation, so just return the string in those cases 454 if ( !$utf8_pcre ) { 455 return $string; 456 } 457 458 // preg_match fails when it encounters invalid UTF8 in $string 459 if ( 1 === @preg_match( '/^./us', $string ) ) { 460 return $string; 461 } 462 463 // Attempt to strip the bad chars if requested (not recommended) 464 if ( $strip && function_exists( 'iconv' ) ) { 465 return iconv( 'utf-8', 'utf-8', $string ); 466 } 467 468 return ''; 469 } 470 471 /** 472 * Encode the Unicode values to be used in the URI. 473 * 474 * @since 1.5.0 475 * 476 * @param string $utf8_string 477 * @param int $length Max length of the string 478 * @return string String with Unicode encoded for URI. 479 */ 480 function utf8_uri_encode( $utf8_string, $length = 0 ) { 481 $unicode = ''; 482 $values = array(); 483 $num_octets = 1; 484 $unicode_length = 0; 485 486 $string_length = strlen( $utf8_string ); 487 for ($i = 0; $i < $string_length; $i++ ) { 488 489 $value = ord( $utf8_string[ $i ] ); 490 491 if ( $value < 128 ) { 492 if ( $length && ( $unicode_length >= $length ) ) 493 break; 494 $unicode .= chr($value); 495 $unicode_length++; 496 } else { 497 if ( count( $values ) == 0 ) $num_octets = ( $value < 224 ) ? 2 : 3; 498 499 $values[] = $value; 500 501 if ( $length && ( $unicode_length + ($num_octets * 3) ) > $length ) 502 break; 503 if ( count( $values ) == $num_octets ) { 504 if ($num_octets == 3) { 505 $unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]) . '%' . dechex($values[2]); 506 $unicode_length += 9; 507 } else { 508 $unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]); 509 $unicode_length += 6; 510 } 511 512 $values = array(); 513 $num_octets = 1; 514 } 515 } 516 } 517 518 return $unicode; 519 } 520 521 /** 522 * Converts all accent characters to ASCII characters. 523 * 524 * If there are no accent characters, then the string given is just returned. 525 * 526 * @since 1.2.1 527 * 528 * @param string $string Text that might have accent characters 529 * @return string Filtered string with replaced "nice" characters. 530 */ 531 function remove_accents($string) { 532 if ( !preg_match('/[\x80-\xff]/', $string) ) 533 return $string; 534 535 if (seems_utf8($string)) { 536 $chars = array( 537 // Decompositions for Latin-1 Supplement 538 chr(195).chr(128) => 'A', chr(195).chr(129) => 'A', 539 chr(195).chr(130) => 'A', chr(195).chr(131) => 'A', 540 chr(195).chr(132) => 'A', chr(195).chr(133) => 'A', 541 chr(195).chr(135) => 'C', chr(195).chr(136) => 'E', 542 chr(195).chr(137) => 'E', chr(195).chr(138) => 'E', 543 chr(195).chr(139) => 'E', chr(195).chr(140) => 'I', 544 chr(195).chr(141) => 'I', chr(195).chr(142) => 'I', 545 chr(195).chr(143) => 'I', chr(195).chr(145) => 'N', 546 chr(195).chr(146) => 'O', chr(195).chr(147) => 'O', 547 chr(195).chr(148) => 'O', chr(195).chr(149) => 'O', 548 chr(195).chr(150) => 'O', chr(195).chr(153) => 'U', 549 chr(195).chr(154) => 'U', chr(195).chr(155) => 'U', 550 chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y', 551 chr(195).chr(159) => 's', chr(195).chr(160) => 'a', 552 chr(195).chr(161) => 'a', chr(195).chr(162) => 'a', 553 chr(195).chr(163) => 'a', chr(195).chr(164) => 'a', 554 chr(195).chr(165) => 'a', chr(195).chr(167) => 'c', 555 chr(195).chr(168) => 'e', chr(195).chr(169) => 'e', 556 chr(195).chr(170) => 'e', chr(195).chr(171) => 'e', 557 chr(195).chr(172) => 'i', chr(195).chr(173) => 'i', 558 chr(195).chr(174) => 'i', chr(195).chr(175) => 'i', 559 chr(195).chr(177) => 'n', chr(195).chr(178) => 'o', 560 chr(195).chr(179) => 'o', chr(195).chr(180) => 'o', 561 chr(195).chr(181) => 'o', chr(195).chr(182) => 'o', 562 chr(195).chr(182) => 'o', chr(195).chr(185) => 'u', 563 chr(195).chr(186) => 'u', chr(195).chr(187) => 'u', 564 chr(195).chr(188) => 'u', chr(195).chr(189) => 'y', 565 chr(195).chr(191) => 'y', 566 // Decompositions for Latin Extended-A 567 chr(196).chr(128) => 'A', chr(196).chr(129) => 'a', 568 chr(196).chr(130) => 'A', chr(196).chr(131) => 'a', 569 chr(196).chr(132) => 'A', chr(196).chr(133) => 'a', 570 chr(196).chr(134) => 'C', chr(196).chr(135) => 'c', 571 chr(196).chr(136) => 'C', chr(196).chr(137) => 'c', 572 chr(196).chr(138) => 'C', chr(196).chr(139) => 'c', 573 chr(196).chr(140) => 'C', chr(196).chr(141) => 'c', 574 chr(196).chr(142) => 'D', chr(196).chr(143) => 'd', 575 chr(196).chr(144) => 'D', chr(196).chr(145) => 'd', 576 chr(196).chr(146) => 'E', chr(196).chr(147) => 'e', 577 chr(196).chr(148) => 'E', chr(196).chr(149) => 'e', 578 chr(196).chr(150) => 'E', chr(196).chr(151) => 'e', 579 chr(196).chr(152) => 'E', chr(196).chr(153) => 'e', 580 chr(196).chr(154) => 'E', chr(196).chr(155) => 'e', 581 chr(196).chr(156) => 'G', chr(196).chr(157) => 'g', 582 chr(196).chr(158) => 'G', chr(196).chr(159) => 'g', 583 chr(196).chr(160) => 'G', chr(196).chr(161) => 'g', 584 chr(196).chr(162) => 'G', chr(196).chr(163) => 'g', 585 chr(196).chr(164) => 'H', chr(196).chr(165) => 'h', 586 chr(196).chr(166) => 'H', chr(196).chr(167) => 'h', 587 chr(196).chr(168) => 'I', chr(196).chr(169) => 'i', 588 chr(196).chr(170) => 'I', chr(196).chr(171) => 'i', 589 chr(196).chr(172) => 'I', chr(196).chr(173) => 'i', 590 chr(196).chr(174) => 'I', chr(196).chr(175) => 'i', 591 chr(196).chr(176) => 'I', chr(196).chr(177) => 'i', 592 chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij', 593 chr(196).chr(180) => 'J', chr(196).chr(181) => 'j', 594 chr(196).chr(182) => 'K', chr(196).chr(183) => 'k', 595 chr(196).chr(184) => 'k', chr(196).chr(185) => 'L', 596 chr(196).chr(186) => 'l', chr(196).chr(187) => 'L', 597 chr(196).chr(188) => 'l', chr(196).chr(189) => 'L', 598 chr(196).chr(190) => 'l', chr(196).chr(191) => 'L', 599 chr(197).chr(128) => 'l', chr(197).chr(129) => 'L', 600 chr(197).chr(130) => 'l', chr(197).chr(131) => 'N', 601 chr(197).chr(132) => 'n', chr(197).chr(133) => 'N', 602 chr(197).chr(134) => 'n', chr(197).chr(135) => 'N', 603 chr(197).chr(136) => 'n', chr(197).chr(137) => 'N', 604 chr(197).chr(138) => 'n', chr(197).chr(139) => 'N', 605 chr(197).chr(140) => 'O', chr(197).chr(141) => 'o', 606 chr(197).chr(142) => 'O', chr(197).chr(143) => 'o', 607 chr(197).chr(144) => 'O', chr(197).chr(145) => 'o', 608 chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe', 609 chr(197).chr(148) => 'R',chr(197).chr(149) => 'r', 610 chr(197).chr(150) => 'R',chr(197).chr(151) => 'r', 611 chr(197).chr(152) => 'R',chr(197).chr(153) => 'r', 612 chr(197).chr(154) => 'S',chr(197).chr(155) => 's', 613 chr(197).chr(156) => 'S',chr(197).chr(157) => 's', 614 chr(197).chr(158) => 'S',chr(197).chr(159) => 's', 615 chr(197).chr(160) => 'S', chr(197).chr(161) => 's', 616 chr(197).chr(162) => 'T', chr(197).chr(163) => 't', 617 chr(197).chr(164) => 'T', chr(197).chr(165) => 't', 618 chr(197).chr(166) => 'T', chr(197).chr(167) => 't', 619 chr(197).chr(168) => 'U', chr(197).chr(169) => 'u', 620 chr(197).chr(170) => 'U', chr(197).chr(171) => 'u', 621 chr(197).chr(172) => 'U', chr(197).chr(173) => 'u', 622 chr(197).chr(174) => 'U', chr(197).chr(175) => 'u', 623 chr(197).chr(176) => 'U', chr(197).chr(177) => 'u', 624 chr(197).chr(178) => 'U', chr(197).chr(179) => 'u', 625 chr(197).chr(180) => 'W', chr(197).chr(181) => 'w', 626 chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y', 627 chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z', 628 chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z', 629 chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z', 630 chr(197).chr(190) => 'z', chr(197).chr(191) => 's', 631 // Euro Sign 632 chr(226).chr(130).chr(172) => 'E', 633 // GBP (Pound) Sign 634 chr(194).chr(163) => ''); 635 636 $string = strtr($string, $chars); 637 } else { 638 // Assume ISO-8859-1 if not UTF-8 639 $chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158) 640 .chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194) 641 .chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202) 642 .chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210) 643 .chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218) 644 .chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227) 645 .chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235) 646 .chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243) 647 .chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251) 648 .chr(252).chr(253).chr(255); 649 650 $chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy"; 651 652 $string = strtr($string, $chars['in'], $chars['out']); 653 $double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254)); 654 $double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th'); 655 $string = str_replace($double_chars['in'], $double_chars['out'], $string); 656 } 657 658 return $string; 659 } 660 661 /** 662 * Sanitizes a filename replacing whitespace with dashes 663 * 664 * Removes special characters that are illegal in filenames on certain 665 * operating systems and special characters requiring special escaping 666 * to manipulate at the command line. Replaces spaces and consecutive 667 * dashes with a single dash. Trim period, dash and underscore from beginning 668 * and end of filename. 669 * 670 * @since 2.1.0 671 * 672 * @param string $filename The filename to be sanitized 673 * @return string The sanitized filename 674 */ 675 function sanitize_file_name( $filename ) { 676 $filename_raw = $filename; 677 $special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", chr(0)); 678 $special_chars = apply_filters('sanitize_file_name_chars', $special_chars, $filename_raw); 679 $filename = str_replace($special_chars, '', $filename); 680 $filename = preg_replace('/[\s-]+/', '-', $filename); 681 $filename = trim($filename, '.-_'); 682 683 // Split the filename into a base and extension[s] 684 $parts = explode('.', $filename); 685 686 // Return if only one extension 687 if ( count($parts) <= 2 ) 688 return apply_filters('sanitize_file_name', $filename, $filename_raw); 689 690 // Process multiple extensions 691 $filename = array_shift($parts); 692 $extension = array_pop($parts); 693 $mimes = get_allowed_mime_types(); 694 695 // Loop over any intermediate extensions. Munge them with a trailing underscore if they are a 2 - 5 character 696 // long alpha string not in the extension whitelist. 697 foreach ( (array) $parts as $part) { 698 $filename .= '.' . $part; 699 700 if ( preg_match("/^[a-zA-Z]{2,5}\d?$/", $part) ) { 701 $allowed = false; 702 foreach ( $mimes as $ext_preg => $mime_match ) { 703 $ext_preg = '!(^' . $ext_preg . ')$!i'; 704 if ( preg_match( $ext_preg, $part ) ) { 705 $allowed = true; 706 break; 707 } 708 } 709 if ( !$allowed ) 710 $filename .= '_'; 711 } 712 } 713 $filename .= '.' . $extension; 714 715 return apply_filters('sanitize_file_name', $filename, $filename_raw); 716 } 717 718 /** 719 * Sanitize username stripping out unsafe characters. 720 * 721 * If $strict is true, only alphanumeric characters (as well as _, space, ., -, 722 * @) are returned. 723 * Removes tags, octets, entities, and if strict is enabled, will remove all 724 * non-ASCII characters. After sanitizing, it passes the username, raw username 725 * (the username in the parameter), and the strict parameter as parameters for 726 * the filter. 727 * 728 * @since 2.0.0 729 * @uses apply_filters() Calls 'sanitize_user' hook on username, raw username, 730 * and $strict parameter. 731 * 732 * @param string $username The username to be sanitized. 733 * @param bool $strict If set limits $username to specific characters. Default false. 734 * @return string The sanitized username, after passing through filters. 735 */ 736 function sanitize_user( $username, $strict = false ) { 737 $raw_username = $username; 738 $username = wp_strip_all_tags($username); 739 // Kill octets 740 $username = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '', $username); 741 $username = preg_replace('/&.+?;/', '', $username); // Kill entities 742 743 // If strict, reduce to ASCII for max portability. 744 if ( $strict ) 745 $username = preg_replace('|[^a-z0-9 _.\-@]|i', '', $username); 746 747 // Consolidate contiguous whitespace 748 $username = preg_replace('|\s+|', ' ', $username); 749 750 return apply_filters('sanitize_user', $username, $raw_username, $strict); 751 } 752 753 /** 754 * Sanitize a string key. 755 * 756 * Keys are used as internal identifiers. They should be lowercase ASCII. Dashes and underscores are allowed. 757 * 758 * @since 3.0.0 759 * 760 * @param string $key String key 761 * @return string Sanitized key 762 */ 763 function sanitize_key( $key ) { 764 $raw_key = $key; 765 $key = wp_strip_all_tags($key); 766 // Kill octets 767 $key = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '', $key); 768 $key = preg_replace('/&.+?;/', '', $key); // Kill entities 769 770 $key = preg_replace('|[^a-z0-9 _.\-@]|i', '', $key); 771 772 // Consolidate contiguous whitespace 773 $key = preg_replace('|\s+|', ' ', $key); 774 775 return apply_filters('sanitize_key', $key, $raw_key); 776 } 777 778 /** 779 * Sanitizes title or use fallback title. 780 * 781 * Specifically, HTML and PHP tags are stripped. Further actions can be added 782 * via the plugin API. If $title is empty and $fallback_title is set, the latter 783 * will be used. 784 * 785 * @since 1.0.0 786 * 787 * @param string $title The string to be sanitized. 788 * @param string $fallback_title Optional. A title to use if $title is empty. 789 * @return string The sanitized string. 790 */ 791 function sanitize_title($title, $fallback_title = '') { 792 $raw_title = $title; 793 $title = strip_tags($title); 794 $title = apply_filters('sanitize_title', $title, $raw_title); 795 796 if ( '' === $title || false === $title ) 797 $title = $fallback_title; 798 799 return $title; 800 } 801 802 /** 803 * Sanitizes title, replacing whitespace with dashes. 804 * 805 * Limits the output to alphanumeric characters, underscore (_) and dash (-). 806 * Whitespace becomes a dash. 807 * 808 * @since 1.2.0 809 * 810 * @param string $title The title to be sanitized. 811 * @return string The sanitized title. 812 */ 813 function sanitize_title_with_dashes($title) { 814 $title = strip_tags($title); 815 // Preserve escaped octets. 816 $title = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '---$1---', $title); 817 // Remove percent signs that are not part of an octet. 818 $title = str_replace('%', '', $title); 819 // Restore octets. 820 $title = preg_replace('|---([a-fA-F0-9][a-fA-F0-9])---|', '%$1', $title); 821 822 $title = remove_accents($title); 823 if (seems_utf8($title)) { 824 if (function_exists('mb_strtolower')) { 825 $title = mb_strtolower($title, 'UTF-8'); 826 } 827 $title = utf8_uri_encode($title, 200); 828 } 829 830 $title = strtolower($title); 831 $title = preg_replace('/&.+?;/', '', $title); // kill entities 832 $title = str_replace('.', '-', $title); 833 $title = preg_replace('/[^%a-z0-9 _-]/', '', $title); 834 $title = preg_replace('/\s+/', '-', $title); 835 $title = preg_replace('|-+|', '-', $title); 836 $title = trim($title, '-'); 837 838 return $title; 839 } 840 841 /** 842 * Ensures a string is a valid SQL order by clause. 843 * 844 * Accepts one or more columns, with or without ASC/DESC, and also accepts 845 * RAND(). 846 * 847 * @since 2.5.1 848 * 849 * @param string $orderby Order by string to be checked. 850 * @return string|false Returns the order by clause if it is a match, false otherwise. 851 */ 852 function sanitize_sql_orderby( $orderby ){ 853 preg_match('/^\s*([a-z0-9_]+(\s+(ASC|DESC))?(\s*,\s*|\s*$))+|^\s*RAND\(\s*\)\s*$/i', $orderby, $obmatches); 854 if ( !$obmatches ) 855 return false; 856 return $orderby; 857 } 858 859 /** 860 * Santizes a html classname to ensure it only contains valid characters 861 * 862 * Strips the string down to A-Z,a-z,0-9,'-' if this results in an empty 863 * string then it will return the alternative value supplied. 864 * 865 * @todo Expand to support the full range of CDATA that a class attribute can contain. 866 * 867 * @since 2.8.0 868 * 869 * @param string $class The classname to be sanitized 870 * @param string $fallback Optional. The value to return if the sanitization end's up as an empty string. 871 * Defaults to an empty string. 872 * @return string The sanitized value 873 */ 874 function sanitize_html_class( $class, $fallback = '' ) { 875 //Strip out any % encoded octets 876 $sanitized = preg_replace('|%[a-fA-F0-9][a-fA-F0-9]|', '', $class); 877 878 //Limit to A-Z,a-z,0-9,'-' 879 $sanitized = preg_replace('/[^A-Za-z0-9-]/', '', $sanitized); 880 881 if ( '' == $sanitized ) 882 $sanitized = $fallback; 883 884 return apply_filters( 'sanitize_html_class', $sanitized, $class, $fallback ); 885 } 886 887 /** 888 * Converts a number of characters from a string. 889 * 890 * Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are 891 * converted into correct XHTML and Unicode characters are converted to the 892 * valid range. 893 * 894 * @since 0.71 895 * 896 * @param string $content String of characters to be converted. 897 * @param string $deprecated Not used. 898 * @return string Converted string. 899 */ 900 function convert_chars($content, $deprecated = '') { 901 if ( !empty( $deprecated ) ) 902 _deprecated_argument( __FUNCTION__, '0.71' ); 903 904 // Translation of invalid Unicode references range to valid range 905 $wp_htmltranswinuni = array( 906 '€' => '€', // the Euro sign 907 '' => '', 908 '‚' => '‚', // these are Windows CP1252 specific characters 909 'ƒ' => 'ƒ', // they would look weird on non-Windows browsers 910 '„' => '„', 911 '…' => '…', 912 '†' => '†', 913 '‡' => '‡', 914 'ˆ' => 'ˆ', 915 '‰' => '‰', 916 'Š' => 'Š', 917 '‹' => '‹', 918 'Œ' => 'Œ', 919 '' => '', 920 'Ž' => 'ž', 921 '' => '', 922 '' => '', 923 '‘' => '‘', 924 '’' => '’', 925 '“' => '“', 926 '”' => '”', 927 '•' => '•', 928 '–' => '–', 929 '—' => '—', 930 '˜' => '˜', 931 '™' => '™', 932 'š' => 'š', 933 '›' => '›', 934 'œ' => 'œ', 935 '' => '', 936 'ž' => '', 937 'Ÿ' => 'Ÿ' 938 ); 939 940 // Remove metadata tags 941 $content = preg_replace('/<title>(.+?)<\/title>/','',$content); 942 $content = preg_replace('/<category>(.+?)<\/category>/','',$content); 943 944 // Converts lone & characters into & (a.k.a. &) 945 $content = preg_replace('/&([^#])(?![a-z1-4]{1,8};)/i', '&$1', $content); 946 947 // Fix Word pasting 948 $content = strtr($content, $wp_htmltranswinuni); 949 950 // Just a little XHTML help 951 $content = str_replace('<br>', '<br />', $content); 952 $content = str_replace('<hr>', '<hr />', $content); 953 954 return $content; 955 } 956 957 /** 958 * Callback used to change %uXXXX to &#YYY; syntax 959 * 960 * @since 2.8? 961 * 962 * @param array $matches Single Match 963 * @return string An HTML entity 964 */ 965 function funky_javascript_callback($matches) { 966 return "&#".base_convert($matches[1],16,10).";"; 967 } 968 969 /** 970 * Fixes javascript bugs in browsers. 971 * 972 * Converts unicode characters to HTML numbered entities. 973 * 974 * @since 1.5.0 975 * @uses $is_macIE 976 * @uses $is_winIE 977 * 978 * @param string $text Text to be made safe. 979 * @return string Fixed text. 980 */ 981 function funky_javascript_fix($text) { 982 // Fixes for browsers' javascript bugs 983 global $is_macIE, $is_winIE; 984 985 if ( $is_winIE || $is_macIE ) 986 $text = preg_replace_callback("/\%u([0-9A-F]{4,4})/", 987 "funky_javascript_callback", 988 $text); 989 990 return $text; 991 } 992 993 /** 994 * Will only balance the tags if forced to and the option is set to balance tags. 995 * 996 * The option 'use_balanceTags' is used for whether the tags will be balanced. 997 * Both the $force parameter and 'use_balanceTags' option will have to be true 998 * before the tags will be balanced. 999 * 1000 * @since 0.71 1001 * 1002 * @param string $text Text to be balanced 1003 * @param bool $force Forces balancing, ignoring the value of the option. Default false. 1004 * @return string Balanced text 1005 */ 1006 function balanceTags( $text, $force = false ) { 1007 if ( !$force && get_option('use_balanceTags') == 0 ) 1008 return $text; 1009 return force_balance_tags( $text ); 1010 } 1011 1012 /** 1013 * Balances tags of string using a modified stack. 1014 * 1015 * @since 2.0.4 1016 * 1017 * @author Leonard Lin <leonard@acm.org> 1018 * @license GPL v2.0 1019 * @copyright November 4, 2001 1020 * @version 1.1 1021 * @todo Make better - change loop condition to $text in 1.2 1022 * @internal Modified by Scott Reilly (coffee2code) 02 Aug 2004 1023 * 1.1 Fixed handling of append/stack pop order of end text 1024 * Added Cleaning Hooks 1025 * 1.0 First Version 1026 * 1027 * @param string $text Text to be balanced. 1028 * @return string Balanced text. 1029 */ 1030 function force_balance_tags( $text ) { 1031 $tagstack = array(); 1032 $stacksize = 0; 1033 $tagqueue = ''; 1034 $newtext = ''; 1035 $single_tags = array('br', 'hr', 'img', 'input'); // Known single-entity/self-closing tags 1036 $nestable_tags = array('blockquote', 'div', 'span'); // Tags that can be immediately nested within themselves 1037 1038 // WP bug fix for comments - in case you REALLY meant to type '< !--' 1039 $text = str_replace('< !--', '< !--', $text); 1040 // WP bug fix for LOVE <3 (and other situations with '<' before a number) 1041 $text = preg_replace('#<([0-9]{1})#', '<$1', $text); 1042 1043 while ( preg_match("/<(\/?[\w:]*)\s*([^>]*)>/", $text, $regex) ) { 1044 $newtext .= $tagqueue; 1045 1046 $i = strpos($text, $regex[0]); 1047 $l = strlen($regex[0]); 1048 1049 // clear the shifter 1050 $tagqueue = ''; 1051 // Pop or Push 1052 if ( isset($regex[1][0]) && '/' == $regex[1][0] ) { // End Tag 1053 $tag = strtolower(substr($regex[1],1)); 1054 // if too many closing tags 1055 if( $stacksize <= 0 ) { 1056 $tag = ''; 1057 // or close to be safe $tag = '/' . $tag; 1058 } 1059 // if stacktop value = tag close value then pop 1060 else if ( $tagstack[$stacksize - 1] == $tag ) { // found closing tag 1061 $tag = '</' . $tag . '>'; // Close Tag 1062 // Pop 1063 array_pop( $tagstack ); 1064 $stacksize--; 1065 } else { // closing tag not at top, search for it 1066 for ( $j = $stacksize-1; $j >= 0; $j-- ) { 1067 if ( $tagstack[$j] == $tag ) { 1068 // add tag to tagqueue 1069 for ( $k = $stacksize-1; $k >= $j; $k--) { 1070 $tagqueue .= '</' . array_pop( $tagstack ) . '>'; 1071 $stacksize--; 1072 } 1073 break; 1074 } 1075 } 1076 $tag = ''; 1077 } 1078 } else { // Begin Tag 1079 $tag = strtolower($regex[1]); 1080 1081 // Tag Cleaning 1082 1083 // If self-closing or '', don't do anything. 1084 if ( substr($regex[2],-1) == '/' || $tag == '' ) { 1085 // do nothing 1086 } 1087 // ElseIf it's a known single-entity tag but it doesn't close itself, do so 1088 elseif ( in_array($tag, $single_tags) ) { 1089 $regex[2] .= '/'; 1090 } else { // Push the tag onto the stack 1091 // If the top of the stack is the same as the tag we want to push, close previous tag 1092 if ( $stacksize > 0 && !in_array($tag, $nestable_tags) && $tagstack[$stacksize - 1] == $tag ) { 1093 $tagqueue = '</' . array_pop ($tagstack) . '>'; 1094 $stacksize--; 1095 } 1096 $stacksize = array_push ($tagstack, $tag); 1097 } 1098 1099 // Attributes 1100 $attributes = $regex[2]; 1101 if( !empty($attributes) ) 1102 $attributes = ' '.$attributes; 1103 1104 $tag = '<' . $tag . $attributes . '>'; 1105 //If already queuing a close tag, then put this tag on, too 1106 if ( !empty($tagqueue) ) { 1107 $tagqueue .= $tag; 1108 $tag = ''; 1109 } 1110 } 1111 $newtext .= substr($text, 0, $i) . $tag; 1112 $text = substr($text, $i + $l); 1113 } 1114 1115 // Clear Tag Queue 1116 $newtext .= $tagqueue; 1117 1118 // Add Remaining text 1119 $newtext .= $text; 1120 1121 // Empty Stack 1122 while( $x = array_pop($tagstack) ) 1123 $newtext .= '</' . $x . '>'; // Add remaining tags to close 1124 1125 // WP fix for the bug with HTML comments 1126 $newtext = str_replace("< !--","<!--",$newtext); 1127 $newtext = str_replace("< !--","< !--",$newtext); 1128 1129 return $newtext; 1130 } 1131 1132 /** 1133 * Acts on text which is about to be edited. 1134 * 1135 * Unless $richedit is set, it is simply a holder for the 'format_to_edit' 1136 * filter. If $richedit is set true htmlspecialchars() will be run on the 1137 * content, converting special characters to HTMl entities. 1138 * 1139 * @since 0.71 1140 * 1141 * @param string $content The text about to be edited. 1142 * @param bool $richedit Whether the $content should pass through htmlspecialchars(). Default false. 1143 * @return string The text after the filter (and possibly htmlspecialchars()) has been run. 1144 */ 1145 function format_to_edit($content, $richedit = false) { 1146 $content = apply_filters('format_to_edit', $content); 1147 if (! $richedit ) 1148 $content = htmlspecialchars($content); 1149 return $content; 1150 } 1151 1152 /** 1153 * Holder for the 'format_to_post' filter. 1154 * 1155 * @since 0.71 1156 * 1157 * @param string $content The text to pass through the filter. 1158 * @return string Text returned from the 'format_to_post' filter. 1159 */ 1160 function format_to_post($content) { 1161 $content = apply_filters('format_to_post', $content); 1162 return $content; 1163 } 1164 1165 /** 1166 * Add leading zeros when necessary. 1167 * 1168 * If you set the threshold to '4' and the number is '10', then you will get 1169 * back '0010'. If you set the number to '4' and the number is '5000', then you 1170 * will get back '5000'. 1171 * 1172 * Uses sprintf to append the amount of zeros based on the $threshold parameter 1173 * and the size of the number. If the number is large enough, then no zeros will 1174 * be appended. 1175 * 1176 * @since 0.71 1177 * 1178 * @param mixed $number Number to append zeros to if not greater than threshold. 1179 * @param int $threshold Digit places number needs to be to not have zeros added. 1180 * @return string Adds leading zeros to number if needed. 1181 */ 1182 function zeroise($number, $threshold) { 1183 return sprintf('%0'.$threshold.'s', $number); 1184 } 1185 1186 /** 1187 * Adds backslashes before letters and before a number at the start of a string. 1188 * 1189 * @since 0.71 1190 * 1191 * @param string $string Value to which backslashes will be added. 1192 * @return string String with backslashes inserted. 1193 */ 1194 function backslashit($string) { 1195 $string = preg_replace('/^([0-9])/', '\\\\\\\\\1', $string); 1196 $string = preg_replace('/([a-z])/i', '\\\\\1', $string); 1197 return $string; 1198 } 1199 1200 /** 1201 * Appends a trailing slash. 1202 * 1203 * Will remove trailing slash if it exists already before adding a trailing 1204 * slash. This prevents double slashing a string or path. 1205 * 1206 * The primary use of this is for paths and thus should be used for paths. It is 1207 * not restricted to paths and offers no specific path support. 1208 * 1209 * @since 1.2.0 1210 * @uses untrailingslashit() Unslashes string if it was slashed already. 1211 * 1212 * @param string $string What to add the trailing slash to. 1213 * @return string String with trailing slash added. 1214 */ 1215 function trailingslashit($string) { 1216 return untrailingslashit($string) . '/'; 1217 } 1218 1219 /** 1220 * Removes trailing slash if it exists. 1221 * 1222 * The primary use of this is for paths and thus should be used for paths. It is 1223 * not restricted to paths and offers no specific path support. 1224 * 1225 * @since 2.2.0 1226 * 1227 * @param string $string What to remove the trailing slash from. 1228 * @return string String without the trailing slash. 1229 */ 1230 function untrailingslashit($string) { 1231 return rtrim($string, '/'); 1232 } 1233 1234 /** 1235 * Adds slashes to escape strings. 1236 * 1237 * Slashes will first be removed if magic_quotes_gpc is set, see {@link 1238 * http://www.php.net/magic_quotes} for more details. 1239 * 1240 * @since 0.71 1241 * 1242 * @param string $gpc The string returned from HTTP request data. 1243 * @return string Returns a string escaped with slashes. 1244 */ 1245 function addslashes_gpc($gpc) { 1246 if ( get_magic_quotes_gpc() ) 1247 $gpc = stripslashes($gpc); 1248 1249 return esc_sql($gpc); 1250 } 1251 1252 /** 1253 * Navigates through an array and removes slashes from the values. 1254 * 1255 * If an array is passed, the array_map() function causes a callback to pass the 1256 * value back to the function. The slashes from this value will removed. 1257 * 1258 * @since 2.0.0 1259 * 1260 * @param array|string $value The array or string to be striped. 1261 * @return array|string Stripped array (or string in the callback). 1262 */ 1263 function stripslashes_deep($value) { 1264 $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); 1265 return $value; 1266 } 1267 1268 /** 1269 * Navigates through an array and encodes the values to be used in a URL. 1270 * 1271 * Uses a callback to pass the value of the array back to the function as a 1272 * string. 1273 * 1274 * @since 2.2.0 1275 * 1276 * @param array|string $value The array or string to be encoded. 1277 * @return array|string $value The encoded array (or string from the callback). 1278 */ 1279 function urlencode_deep($value) { 1280 $value = is_array($value) ? array_map('urlencode_deep', $value) : urlencode($value); 1281 return $value; 1282 } 1283 1284 /** 1285 * Converts email addresses characters to HTML entities to block spam bots. 1286 * 1287 * @since 0.71 1288 * 1289 * @param string $emailaddy Email address. 1290 * @param int $mailto Optional. Range from 0 to 1. Used for encoding. 1291 * @return string Converted email address. 1292 */ 1293 function antispambot($emailaddy, $mailto=0) { 1294 $emailNOSPAMaddy = ''; 1295 srand ((float) microtime() * 1000000); 1296 for ($i = 0; $i < strlen($emailaddy); $i = $i + 1) { 1297 $j = floor(rand(0, 1+$mailto)); 1298 if ($j==0) { 1299 $emailNOSPAMaddy .= '&#'.ord(substr($emailaddy,$i,1)).';'; 1300 } elseif ($j==1) { 1301 $emailNOSPAMaddy .= substr($emailaddy,$i,1); 1302 } elseif ($j==2) { 1303 $emailNOSPAMaddy .= '%'.zeroise(dechex(ord(substr($emailaddy, $i, 1))), 2); 1304 } 1305 } 1306 $emailNOSPAMaddy = str_replace('@','@',$emailNOSPAMaddy); 1307 return $emailNOSPAMaddy; 1308 } 1309 1310 /** 1311 * Callback to convert URI match to HTML A element. 1312 * 1313 * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link 1314 * make_clickable()}. 1315 * 1316 * @since 2.3.2 1317 * @access private 1318 * 1319 * @param array $matches Single Regex Match. 1320 * @return string HTML A element with URI address. 1321 */ 1322 function _make_url_clickable_cb($matches) { 1323 $url = $matches[2]; 1324 1325 $url = esc_url($url); 1326 if ( empty($url) ) 1327 return $matches[0]; 1328 1329 return $matches[1] . "<a href=\"$url\" rel=\"nofollow\">$url</a>"; 1330 } 1331 1332 /** 1333 * Callback to convert URL match to HTML A element. 1334 * 1335 * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link 1336 * make_clickable()}. 1337 * 1338 * @since 2.3.2 1339 * @access private 1340 * 1341 * @param array $matches Single Regex Match. 1342 * @return string HTML A element with URL address. 1343 */ 1344 function _make_web_ftp_clickable_cb($matches) { 1345 $ret = ''; 1346 $dest = $matches[2]; 1347 $dest = 'http://' . $dest; 1348 $dest = esc_url($dest); 1349 if ( empty($dest) ) 1350 return $matches[0]; 1351 1352 // removed trailing [.,;:)] from URL 1353 if ( in_array( substr($dest, -1), array('.', ',', ';', ':', ')') ) === true ) { 1354 $ret = substr($dest, -1); 1355 $dest = substr($dest, 0, strlen($dest)-1); 1356 } 1357 return $matches[1] . "<a href=\"$dest\" rel=\"nofollow\">$dest</a>$ret"; 1358 } 1359 1360 /** 1361 * Callback to convert email address match to HTML A element. 1362 * 1363 * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link 1364 * make_clickable()}. 1365 * 1366 * @since 2.3.2 1367 * @access private 1368 * 1369 * @param array $matches Single Regex Match. 1370 * @return string HTML A element with email address. 1371 */ 1372 function _make_email_clickable_cb($matches) { 1373 $email = $matches[2] . '@' . $matches[3]; 1374 return $matches[1] . "<a href=\"mailto:$email\">$email</a>"; 1375 } 1376 1377 /** 1378 * Convert plaintext URI to HTML links. 1379 * 1380 * Converts URI, www and ftp, and email addresses. Finishes by fixing links 1381 * within links. 1382 * 1383 * @since 0.71 1384 * 1385 * @param string $ret Content to convert URIs. 1386 * @return string Content with converted URIs. 1387 */ 1388 function make_clickable($ret) { 1389 $ret = ' ' . $ret; 1390 // in testing, using arrays here was found to be faster 1391 $ret = preg_replace_callback('#(?<=[\s>])(\()?([\w]+?://(?:[\w\\x80-\\xff\#$%&~/=?@\[\](+-]|[.,;:](?![\s<]|(\))?([\s]|$))|(?(1)\)(?![\s<.,;:]|$)|\)))+)#is', '_make_url_clickable_cb', $ret); 1392 $ret = preg_replace_callback('#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is', '_make_web_ftp_clickable_cb', $ret); 1393 $ret = preg_replace_callback('#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret); 1394 // this one is not in an array because we need it to run last, for cleanup of accidental links within links 1395 $ret = preg_replace("#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i", "$1$3</a>", $ret); 1396 $ret = trim($ret); 1397 return $ret; 1398 } 1399 1400 /** 1401 * Adds rel nofollow string to all HTML A elements in content. 1402 * 1403 * @since 1.5.0 1404 * 1405 * @param string $text Content that may contain HTML A elements. 1406 * @return string Converted content. 1407 */ 1408 function wp_rel_nofollow( $text ) { 1409 // This is a pre save filter, so text is already escaped. 1410 $text = stripslashes($text); 1411 $text = preg_replace_callback('|<a (.+?)>|i', 'wp_rel_nofollow_callback', $text); 1412 $text = esc_sql($text); 1413 return $text; 1414 } 1415 1416 /** 1417 * Callback to used to add rel=nofollow string to HTML A element. 1418 * 1419 * Will remove already existing rel="nofollow" and rel='nofollow' from the 1420 * string to prevent from invalidating (X)HTML. 1421 * 1422 * @since 2.3.0 1423 * 1424 * @param array $matches Single Match 1425 * @return string HTML A Element with rel nofollow. 1426 */ 1427 function wp_rel_nofollow_callback( $matches ) { 1428 $text = $matches[1]; 1429 $text = str_replace(array(' rel="nofollow"', " rel='nofollow'"), '', $text); 1430 return "<a $text rel=\"nofollow\">"; 1431 } 1432 1433 /** 1434 * Convert one smiley code to the icon graphic file equivalent. 1435 * 1436 * Looks up one smiley code in the $wpsmiliestrans global array and returns an 1437 * <img> string for that smiley. 1438 * 1439 * @global array $wpsmiliestrans 1440 * @since 2.8.0 1441 * 1442 * @param string $smiley Smiley code to convert to image. 1443 * @return string Image string for smiley. 1444 */ 1445 function translate_smiley($smiley) { 1446 global $wpsmiliestrans; 1447 1448 if (count($smiley) == 0) { 1449 return ''; 1450 } 1451 1452 $siteurl = get_option( 'siteurl' ); 1453 1454 $smiley = trim(reset($smiley)); 1455 $img = $wpsmiliestrans[$smiley]; 1456 $smiley_masked = esc_attr($smiley); 1457 1458 $srcurl = apply_filters('smilies_src', "$siteurl/wp-includes/images/smilies/$img", $img, $siteurl); 1459 1460 return " <img src='$srcurl' alt='$smiley_masked' class='wp-smiley' /> "; 1461 } 1462 1463 /** 1464 * Convert text equivalent of smilies to images. 1465 * 1466 * Will only convert smilies if the option 'use_smilies' is true and the global 1467 * used in the function isn't empty. 1468 * 1469 * @since 0.71 1470 * @uses $wp_smiliessearch 1471 * 1472 * @param string $text Content to convert smilies from text. 1473 * @return string Converted content with text smilies replaced with images. 1474 */ 1475 function convert_smilies($text) { 1476 global $wp_smiliessearch; 1477 $output = ''; 1478 if ( get_option('use_smilies') && !empty($wp_smiliessearch) ) { 1479 // HTML loop taken from texturize function, could possible be consolidated 1480 $textarr = preg_split("/(<.*>)/U", $text, -1, PREG_SPLIT_DELIM_CAPTURE); // capture the tags as well as in between 1481 $stop = count($textarr);// loop stuff 1482 for ($i = 0; $i < $stop; $i++) { 1483 $content = $textarr[$i]; 1484 if ((strlen($content) > 0) && ('<' != $content{0})) { // If it's not a tag 1485 $content = preg_replace_callback($wp_smiliessearch, 'translate_smiley', $content); 1486 } 1487 $output .= $content; 1488 } 1489 } else { 1490 // return default text. 1491 $output = $text; 1492 } 1493 return $output; 1494 } 1495 1496 /** 1497 * Verifies that an email is valid. 1498 * 1499 * Does not grok i18n domains. Not RFC compliant. 1500 * 1501 * @since 0.71 1502 * 1503 * @param string $email Email address to verify. 1504 * @param boolean $check_dns Whether to check the DNS for the domain using checkdnsrr(). 1505 * @return string|bool Either false or the valid email address. 1506 */ 1507 function is_email( $email, $check_dns = false ) { 1508 // Test for the minimum length the email can be 1509 if ( strlen( $email ) < 3 ) { 1510 return apply_filters( 'is_email', false, $email, 'email_too_short' ); 1511 } 1512 1513 // Test for an @ character after the first position 1514 if ( strpos( $email, '@', 1 ) === false ) { 1515 return apply_filters( 'is_email', false, $email, 'email_no_at' ); 1516 } 1517 1518 // Split out the local and domain parts 1519 list( $local, $domain ) = explode( '@', $email, 2 ); 1520 1521 // LOCAL PART 1522 // Test for invalid characters 1523 if ( !preg_match( '/^[a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]+$/', $local ) ) { 1524 return apply_filters( 'is_email', false, $email, 'local_invalid_chars' ); 1525 } 1526 1527 // DOMAIN PART 1528 // Test for sequences of periods 1529 if ( preg_match( '/\.{2,}/', $domain ) ) { 1530 return apply_filters( 'is_email', false, $email, 'domain_period_sequence' ); 1531 } 1532 1533 // Test for leading and trailing periods and whitespace 1534 if ( trim( $domain, " \t\n\r\0\x0B." ) !== $domain ) { 1535 return apply_filters( 'is_email', false, $email, 'domain_period_limits' ); 1536 } 1537 1538 // Split the domain into subs 1539 $subs = explode( '.', $domain ); 1540 1541 // Assume the domain will have at least two subs 1542 if ( 2 > count( $subs ) ) { 1543 return apply_filters( 'is_email', false, $email, 'domain_no_periods' ); 1544 } 1545 1546 // Loop through each sub 1547 foreach ( $subs as $sub ) { 1548 // Test for leading and trailing hyphens and whitespace 1549 if ( trim( $sub, " \t\n\r\0\x0B-" ) !== $sub ) { 1550 return apply_filters( 'is_email', false, $email, 'sub_hyphen_limits' ); 1551 } 1552 1553 // Test for invalid characters 1554 if ( !preg_match('/^[a-z0-9-]+$/i', $sub ) ) { 1555 return apply_filters( 'is_email', false, $email, 'sub_invalid_chars' ); 1556 } 1557 } 1558 1559 // DNS 1560 // Check the domain has a valid MX and A resource record 1561 if ( $check_dns && function_exists( 'checkdnsrr' ) && !( checkdnsrr( $domain . '.', 'MX' ) || checkdnsrr( $domain . '.', 'A' ) ) ) { 1562 return apply_filters( 'is_email', false, $email, 'dns_no_rr' ); 1563 } 1564 1565 // Congratulations your email made it! 1566 return apply_filters( 'is_email', $email, $email, null ); 1567 } 1568 1569 /** 1570 * Convert to ASCII from email subjects. 1571 * 1572 * @since 1.2.0 1573 * @usedby wp_mail() handles charsets in email subjects 1574 * 1575 * @param string $string Subject line 1576 * @return string Converted string to ASCII 1577 */ 1578 function wp_iso_descrambler($string) { 1579 /* this may only work with iso-8859-1, I'm afraid */ 1580 if (!preg_match('#\=\?(.+)\?Q\?(.+)\?\=#i', $string, $matches)) { 1581 return $string; 1582 } else { 1583 $subject = str_replace('_', ' ', $matches[2]); 1584 $subject = preg_replace_callback('#\=([0-9a-f]{2})#i', create_function('$match', 'return chr(hexdec(strtolower($match[1])));'), $subject); 1585 return $subject; 1586 } 1587 } 1588 1589 /** 1590 * Returns a date in the GMT equivalent. 1591 * 1592 * Requires and returns a date in the Y-m-d H:i:s format. Simply subtracts the 1593 * value of the 'gmt_offset' option. Return format can be overridden using the 1594 * $format parameter 1595 * 1596 * @since 1.2.0 1597 * 1598 * @uses get_option() to retrieve the the value of 'gmt_offset'. 1599 * @param string $string The date to be converted. 1600 * @param string $format The format string for the returned date (default is Y-m-d H:i:s) 1601 * @return string GMT version of the date provided. 1602 */ 1603 function get_gmt_from_date($string, $format = 'Y-m-d H:i:s') { 1604 preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches); 1605 $string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]); 1606 $string_gmt = gmdate($format, $string_time - get_option('gmt_offset') * 3600); 1607 return $string_gmt; 1608 } 1609 1610 /** 1611 * Converts a GMT date into the correct format for the blog. 1612 * 1613 * Requires and returns in the Y-m-d H:i:s format. Simply adds the value of 1614 * gmt_offset.Return format can be overridden using the $format parameter 1615 * 1616 * @since 1.2.0 1617 * 1618 * @param string $string The date to be converted. 1619 * @param string $format The format string for the returned date (default is Y-m-d H:i:s) 1620 * @return string Formatted date relative to the GMT offset. 1621 */ 1622 function get_date_from_gmt($string, $format = 'Y-m-d H:i:s') { 1623 preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches); 1624 $string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]); 1625 $string_localtime = gmdate($format, $string_time + get_option('gmt_offset')*3600); 1626 return $string_localtime; 1627 } 1628 1629 /** 1630 * Computes an offset in seconds from an iso8601 timezone. 1631 * 1632 * @since 1.5.0 1633 * 1634 * @param string $timezone Either 'Z' for 0 offset or '±hhmm'. 1635 * @return int|float The offset in seconds. 1636 */ 1637 function iso8601_timezone_to_offset($timezone) { 1638 // $timezone is either 'Z' or '[+|-]hhmm' 1639 if ($timezone == 'Z') { 1640 $offset = 0; 1641 } else { 1642 $sign = (substr($timezone, 0, 1) == '+') ? 1 : -1; 1643 $hours = intval(substr($timezone, 1, 2)); 1644 $minutes = intval(substr($timezone, 3, 4)) / 60; 1645 $offset = $sign * 3600 * ($hours + $minutes); 1646 } 1647 return $offset; 1648 } 1649 1650 /** 1651 * Converts an iso8601 date to MySQL DateTime format used by post_date[_gmt]. 1652 * 1653 * @since 1.5.0 1654 * 1655 * @param string $date_string Date and time in ISO 8601 format {@link http://en.wikipedia.org/wiki/ISO_8601}. 1656 * @param string $timezone Optional. If set to GMT returns the time minus gmt_offset. Default is 'user'. 1657 * @return string The date and time in MySQL DateTime format - Y-m-d H:i:s. 1658 */ 1659 function iso8601_to_datetime($date_string, $timezone = 'user') { 1660 $timezone = strtolower($timezone); 1661 1662 if ($timezone == 'gmt') { 1663 1664 preg_match('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', $date_string, $date_bits); 1665 1666 if (!empty($date_bits[7])) { // we have a timezone, so let's compute an offset 1667 $offset = iso8601_timezone_to_offset($date_bits[7]); 1668 } else { // we don't have a timezone, so we assume user local timezone (not server's!) 1669 $offset = 3600 * get_option('gmt_offset'); 1670 } 1671 1672 $timestamp = gmmktime($date_bits[4], $date_bits[5], $date_bits[6], $date_bits[2], $date_bits[3], $date_bits[1]); 1673 $timestamp -= $offset; 1674 1675 return gmdate('Y-m-d H:i:s', $timestamp); 1676 1677 } else if ($timezone == 'user') { 1678 return preg_replace('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', '$1-$2-$3 $4:$5:$6', $date_string); 1679 } 1680 } 1681 1682 /** 1683 * Adds a element attributes to open links in new windows. 1684 * 1685 * Comment text in popup windows should be filtered through this. Right now it's 1686 * a moderately dumb function, ideally it would detect whether a target or rel 1687 * attribute was already there and adjust its actions accordingly. 1688 * 1689 * @since 0.71 1690 * 1691 * @param string $text Content to replace links to open in a new window. 1692 * @return string Content that has filtered links. 1693 */ 1694 function popuplinks($text) { 1695 $text = preg_replace('/<a (.+?)>/i', "<a $1 target='_blank' rel='external'>", $text); 1696 return $text; 1697 } 1698 1699 /** 1700 * Strips out all characters that are not allowable in an email. 1701 * 1702 * @since 1.5.0 1703 * 1704 * @param string $email Email address to filter. 1705 * @return string Filtered email address. 1706 */ 1707 function sanitize_email( $email ) { 1708 // Test for the minimum length the email can be 1709 if ( strlen( $email ) < 3 ) { 1710 return apply_filters( 'sanitize_email', '', $email, 'email_too_short' ); 1711 } 1712 1713 // Test for an @ character after the first position 1714 if ( strpos( $email, '@', 1 ) === false ) { 1715 return apply_filters( 'sanitize_email', '', $email, 'email_no_at' ); 1716 } 1717 1718 // Split out the local and domain parts 1719 list( $local, $domain ) = explode( '@', $email, 2 ); 1720 1721 // LOCAL PART 1722 // Test for invalid characters 1723 $local = preg_replace( '/[^a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]/', '', $local ); 1724 if ( '' === $local ) { 1725 return apply_filters( 'sanitize_email', '', $email, 'local_invalid_chars' ); 1726 } 1727 1728 // DOMAIN PART 1729 // Test for sequences of periods 1730 $domain = preg_replace( '/\.{2,}/', '', $domain ); 1731 if ( '' === $domain ) { 1732 return apply_filters( 'sanitize_email', '', $email, 'domain_period_sequence' ); 1733 } 1734 1735 // Test for leading and trailing periods and whitespace 1736 $domain = trim( $domain, " \t\n\r\0\x0B." ); 1737 if ( '' === $domain ) { 1738 return apply_filters( 'sanitize_email', '', $email, 'domain_period_limits' ); 1739 } 1740 1741 // Split the domain into subs 1742 $subs = explode( '.', $domain ); 1743 1744 // Assume the domain will have at least two subs 1745 if ( 2 > count( $subs ) ) { 1746 return apply_filters( 'sanitize_email', '', $email, 'domain_no_periods' ); 1747 } 1748 1749 // Create an array that will contain valid subs 1750 $new_subs = array(); 1751 1752 // Loop through each sub 1753 foreach ( $subs as $sub ) { 1754 // Test for leading and trailing hyphens 1755 $sub = trim( $sub, " \t\n\r\0\x0B-" ); 1756 1757 // Test for invalid characters 1758 $sub = preg_replace( '/^[^a-z0-9-]+$/i', '', $sub ); 1759 1760 // If there's anything left, add it to the valid subs 1761 if ( '' !== $sub ) { 1762 $new_subs[] = $sub; 1763 } 1764 } 1765 1766 // If there aren't 2 or more valid subs 1767 if ( 2 > count( $new_subs ) ) { 1768 return apply_filters( 'sanitize_email', '', $email, 'domain_no_valid_subs' ); 1769 } 1770 1771 // Join valid subs into the new domain 1772 $domain = join( '.', $new_subs ); 1773 1774 // Put the email back together 1775 $email = $local . '@' . $domain; 1776 1777 // Congratulations your email made it! 1778 return apply_filters( 'sanitize_email', $email, $email, null ); 1779 } 1780 1781 /** 1782 * Determines the difference between two timestamps. 1783 * 1784 * The difference is returned in a human readable format such as "1 hour", 1785 * "5 mins", "2 days". 1786 * 1787 * @since 1.5.0 1788 * 1789 * @param int $from Unix timestamp from which the difference begins. 1790 * @param int $to Optional. Unix timestamp to end the time difference. Default becomes time() if not set. 1791 * @return string Human readable time difference. 1792 */ 1793 function human_time_diff( $from, $to = '' ) { 1794 if ( empty($to) ) 1795 $to = time(); 1796 $diff = (int) abs($to - $from); 1797 if ($diff <= 3600) { 1798 $mins = round($diff / 60); 1799 if ($mins <= 1) { 1800 $mins = 1; 1801 } 1802 /* translators: min=minute */ 1803 $since = sprintf(_n('%s min', '%s mins', $mins), $mins); 1804 } else if (($diff <= 86400) && ($diff > 3600)) { 1805 $hours = round($diff / 3600); 1806 if ($hours <= 1) { 1807 $hours = 1; 1808 } 1809 $since = sprintf(_n('%s hour', '%s hours', $hours), $hours); 1810 } elseif ($diff >= 86400) { 1811 $days = round($diff / 86400); 1812 if ($days <= 1) { 1813 $days = 1; 1814 } 1815 $since = sprintf(_n('%s day', '%s days', $days), $days); 1816 } 1817 return $since; 1818 } 1819 1820 /** 1821 * Generates an excerpt from the content, if needed. 1822 * 1823 * The excerpt word amount will be 55 words and if the amount is greater than 1824 * that, then the string ' [...]' will be appended to the excerpt. If the string 1825 * is less than 55 words, then the content will be returned as is. 1826 * 1827 * The 55 word limit can be modified by plugins/themes using the excerpt_length filter 1828 * The ' [...]' string can be modified by plugins/themes using the excerpt_more filter 1829 * 1830 * @since 1.5.0 1831 * 1832 * @param string $text The excerpt. If set to empty an excerpt is generated. 1833 * @return string The excerpt. 1834 */ 1835 function wp_trim_excerpt($text) { 1836 $raw_excerpt = $text; 1837 if ( '' == $text ) { 1838 $text = get_the_content(''); 1839 1840 $text = strip_shortcodes( $text ); 1841 1842 $text = apply_filters('the_content', $text); 1843 $text = str_replace(']]>', ']]>', $text); 1844 $text = strip_tags($text); 1845 $excerpt_length = apply_filters('excerpt_length', 55); 1846 $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]'); 1847 $words = preg_split("/[\n\r\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY); 1848 if ( count($words) > $excerpt_length ) { 1849 array_pop($words); 1850 $text = implode(' ', $words); 1851 $text = $text . $excerpt_more; 1852 } else { 1853 $text = implode(' ', $words); 1854 } 1855 } 1856 return apply_filters('wp_trim_excerpt', $text, $raw_excerpt); 1857 } 1858 1859 /** 1860 * Converts named entities into numbered entities. 1861 * 1862 * @since 1.5.1 1863 * 1864 * @param string $text The text within which entities will be converted. 1865 * @return string Text with converted entities. 1866 */ 1867 function ent2ncr($text) { 1868 $to_ncr = array( 1869 '"' => '"', 1870 '&' => '&', 1871 '⁄' => '/', 1872 '<' => '<', 1873 '>' => '>', 1874 '|' => '|', 1875 ' ' => ' ', 1876 '¡' => '¡', 1877 '¢' => '¢', 1878 '£' => '£', 1879 '¤' => '¤', 1880 '¥' => '¥', 1881 '¦' => '¦', 1882 '&brkbar;' => '¦', 1883 '§' => '§', 1884 '¨' => '¨', 1885 '¨' => '¨', 1886 '©' => '©', 1887 'ª' => 'ª', 1888 '«' => '«', 1889 '¬' => '¬', 1890 '­' => '­', 1891 '®' => '®', 1892 '¯' => '¯', 1893 '&hibar;' => '¯', 1894 '°' => '°', 1895 '±' => '±', 1896 '²' => '²', 1897 '³' => '³', 1898 '´' => '´', 1899 'µ' => 'µ', 1900 '¶' => '¶', 1901 '·' => '·', 1902 '¸' => '¸', 1903 '¹' => '¹', 1904 'º' => 'º', 1905 '»' => '»', 1906 '¼' => '¼', 1907 '½' => '½', 1908 '¾' => '¾', 1909 '¿' => '¿', 1910 'À' => 'À', 1911 'Á' => 'Á', 1912 'Â' => 'Â', 1913 'Ã' => 'Ã', 1914 'Ä' => 'Ä', 1915 'Å' => 'Å', 1916 'Æ' => 'Æ', 1917 'Ç' => 'Ç', 1918 'È' => 'È', 1919 'É' => 'É', 1920 'Ê' => 'Ê', 1921 'Ë' => 'Ë', 1922 'Ì' => 'Ì', 1923 'Í' => 'Í', 1924 'Î' => 'Î', 1925 'Ï' => 'Ï', 1926 'Ð' => 'Ð', 1927 'Ñ' => 'Ñ', 1928 'Ò' => 'Ò', 1929 'Ó' => 'Ó', 1930 'Ô' => 'Ô', 1931 'Õ' => 'Õ', 1932 'Ö' => 'Ö', 1933 '×' => '×', 1934 'Ø' => 'Ø', 1935 'Ù' => 'Ù', 1936 'Ú' => 'Ú', 1937 'Û' => 'Û', 1938 'Ü' => 'Ü', 1939 'Ý' => 'Ý', 1940 'Þ' => 'Þ', 1941 'ß' => 'ß', 1942 'à' => 'à', 1943 'á' => 'á', 1944 'â' => 'â', 1945 'ã' => 'ã', 1946 'ä' => 'ä', 1947 'å' => 'å', 1948 'æ' => 'æ', 1949 'ç' => 'ç', 1950 'è' => 'è', 1951 'é' => 'é', 1952 'ê' => 'ê', 1953 'ë' => 'ë', 1954 'ì' => 'ì', 1955 'í' => 'í', 1956 'î' => 'î', 1957 'ï' => 'ï', 1958 'ð' => 'ð', 1959 'ñ' => 'ñ', 1960 'ò' => 'ò', 1961 'ó' => 'ó', 1962 'ô' => 'ô', 1963 'õ' => 'õ', 1964 'ö' => 'ö', 1965 '÷' => '÷', 1966 'ø' => 'ø', 1967 'ù' => 'ù', 1968 'ú' => 'ú', 1969 'û' => 'û', 1970 'ü' => 'ü', 1971 'ý' => 'ý', 1972 'þ' => 'þ', 1973 'ÿ' => 'ÿ', 1974 'Œ' => 'Œ', 1975 'œ' => 'œ', 1976 'Š' => 'Š', 1977 'š' => 'š', 1978 'Ÿ' => 'Ÿ', 1979 'ƒ' => 'ƒ', 1980 'ˆ' => 'ˆ', 1981 '˜' => '˜', 1982 'Α' => 'Α', 1983 'Β' => 'Β', 1984 'Γ' => 'Γ', 1985 'Δ' => 'Δ', 1986 'Ε' => 'Ε', 1987 'Ζ' => 'Ζ', 1988 'Η' => 'Η', 1989 'Θ' => 'Θ', 1990 'Ι' => 'Ι', 1991 'Κ' => 'Κ', 1992 'Λ' => 'Λ', 1993 'Μ' => 'Μ', 1994 'Ν' => 'Ν', 1995 'Ξ' => 'Ξ', 1996 'Ο' => 'Ο', 1997 'Π' => 'Π', 1998 'Ρ' => 'Ρ', 1999 'Σ' => 'Σ', 2000 'Τ' => 'Τ', 2001 'Υ' => 'Υ', 2002 'Φ' => 'Φ', 2003 'Χ' => 'Χ', 2004 'Ψ' => 'Ψ', 2005 'Ω' => 'Ω', 2006 'α' => 'α', 2007 'β' => 'β', 2008 'γ' => 'γ', 2009 'δ' => 'δ', 2010 'ε' => 'ε', 2011 'ζ' => 'ζ', 2012 'η' => 'η', 2013 'θ' => 'θ', 2014 'ι' => 'ι', 2015 'κ' => 'κ', 2016 'λ' => 'λ', 2017 'μ' => 'μ', 2018 'ν' => 'ν', 2019 'ξ' => 'ξ', 2020 'ο' => 'ο', 2021 'π' => 'π', 2022 'ρ' => 'ρ', 2023 'ς' => 'ς', 2024 'σ' => 'σ', 2025 'τ' => 'τ', 2026 'υ' => 'υ', 2027 'φ' => 'φ', 2028 'χ' => 'χ', 2029 'ψ' => 'ψ', 2030 'ω' => 'ω', 2031 'ϑ' => 'ϑ', 2032 'ϒ' => 'ϒ', 2033 'ϖ' => 'ϖ', 2034 ' ' => ' ', 2035 ' ' => ' ', 2036 ' ' => ' ', 2037 '‌' => '‌', 2038 '‍' => '‍', 2039 '‎' => '‎', 2040 '‏' => '‏', 2041 '–' => '–', 2042 '—' => '—', 2043 '‘' => '‘', 2044 '’' => '’', 2045 '‚' => '‚', 2046 '“' => '“', 2047 '”' => '”', 2048 '„' => '„', 2049 '†' => '†', 2050 '‡' => '‡', 2051 '•' => '•', 2052 '…' => '…', 2053 '‰' => '‰', 2054 '′' => '′', 2055 '″' => '″', 2056 '‹' => '‹', 2057 '›' => '›', 2058 '‾' => '‾', 2059 '⁄' => '⁄', 2060 '€' => '€', 2061 'ℑ' => 'ℑ', 2062 '℘' => '℘', 2063 'ℜ' => 'ℜ', 2064 '™' => '™', 2065 'ℵ' => 'ℵ', 2066 '↵' => '↵', 2067 '⇐' => '⇐', 2068 '⇑' => '⇑', 2069 '⇒' => '⇒', 2070 '⇓' => '⇓', 2071 '⇔' => '⇔', 2072 '∀' => '∀', 2073 '∂' => '∂', 2074 '∃' => '∃', 2075 '∅' => '∅', 2076 '∇' => '∇', 2077 '∈' => '∈', 2078 '∉' => '∉', 2079 '∋' => '∋', 2080 '∏' => '∏', 2081 '∑' => '∑', 2082 '−' => '−', 2083 '∗' => '∗', 2084 '√' => '√', 2085 '∝' => '∝', 2086 '∞' => '∞', 2087 '∠' => '∠', 2088 '∧' => '∧', 2089 '∨' => '∨', 2090 '∩' => '∩', 2091 '∪' => '∪', 2092 '∫' => '∫', 2093 '∴' => '∴', 2094 '∼' => '∼', 2095 '≅' => '≅', 2096 '≈' => '≈', 2097 '≠' => '≠', 2098 '≡' => '≡', 2099 '≤' => '≤', 2100 '≥' => '≥', 2101 '⊂' => '⊂', 2102 '⊃' => '⊃', 2103 '⊄' => '⊄', 2104 '⊆' => '⊆', 2105 '⊇' => '⊇', 2106 '⊕' => '⊕', 2107 '⊗' => '⊗', 2108 '⊥' => '⊥', 2109 '⋅' => '⋅', 2110 '⌈' => '⌈', 2111 '⌉' => '⌉', 2112 '⌊' => '⌊', 2113 '⌋' => '⌋', 2114 '⟨' => '〈', 2115 '⟩' => '〉', 2116 '←' => '←', 2117 '↑' => '↑', 2118 '→' => '→', 2119 '↓' => '↓', 2120 '↔' => '↔', 2121 '◊' => '◊', 2122 '♠' => '♠', 2123 '♣' => '♣', 2124 '♥' => '♥', 2125 '♦' => '♦' 2126 ); 2127 2128 return str_replace( array_keys($to_ncr), array_values($to_ncr), $text ); 2129 } 2130 2131 /** 2132 * Formats text for the rich text editor. 2133 * 2134 * The filter 'richedit_pre' is applied here. If $text is empty the filter will 2135 * be applied to an empty string. 2136 * 2137 * @since 2.0.0 2138 * 2139 * @param string $text The text to be formatted. 2140 * @return string The formatted text after filter is applied. 2141 */ 2142 function wp_richedit_pre($text) { 2143 // Filtering a blank results in an annoying <br />\n 2144 if ( empty($text) ) return apply_filters('richedit_pre', ''); 2145 2146 $output = convert_chars($text); 2147 $output = wpautop($output); 2148 $output = htmlspecialchars($output, ENT_NOQUOTES); 2149 2150 return apply_filters('richedit_pre', $output); 2151 } 2152 2153 /** 2154 * Formats text for the HTML editor. 2155 * 2156 * Unless $output is empty it will pass through htmlspecialchars before the 2157 * 'htmledit_pre' filter is applied. 2158 * 2159 * @since 2.5.0 2160 * 2161 * @param string $output The text to be formatted. 2162 * @return string Formatted text after filter applied. 2163 */ 2164 function wp_htmledit_pre($output) { 2165 if ( !empty($output) ) 2166 $output = htmlspecialchars($output, ENT_NOQUOTES); // convert only < > & 2167 2168 return apply_filters('htmledit_pre', $output); 2169 } 2170 2171 /** 2172 * Perform a deep string replace operation to ensure the values in $search are no longer present 2173 * 2174 * Repeats the replacement operation until it no longer replaces anything so as to remove "nested" values 2175 * e.g. $subject = '%0%0%0DDD', $search ='%0D', $result ='' rather than the '%0%0DD' that 2176 * str_replace would return 2177 * 2178 * @since 2.8.1 2179 * @access private 2180 * 2181 * @param string|array $search 2182 * @param string $subject 2183 * @return string The processed string 2184 */ 2185 function _deep_replace($search, $subject){ 2186 $found = true; 2187 while($found) { 2188 $found = false; 2189 foreach( (array) $search as $val ) { 2190 while(strpos($subject, $val) !== false) { 2191 $found = true; 2192 $subject = str_replace($val, '', $subject); 2193 } 2194 } 2195 } 2196 2197 return $subject; 2198 } 2199 2200 /** 2201 * Escapes data for use in a MySQL query 2202 * 2203 * This is just a handy shortcut for $wpdb->escape(), for completeness' sake 2204 * 2205 * @since 2.8.0 2206 * @param string $sql Unescaped SQL data 2207 * @return string The cleaned $sql 2208 */ 2209 function esc_sql( $sql ) { 2210 global $wpdb; 2211 return $wpdb->escape( $sql ); 2212 } 2213 2214 /** 2215 * Checks and cleans a URL. 2216 * 2217 * A number of characters are removed from the URL. If the URL is for displaying 2218 * (the default behaviour) amperstands are also replaced. The 'clean_url' filter 2219 * is applied to the returned cleaned URL. 2220 * 2221 * @since 2.8.0 2222 * @uses wp_kses_bad_protocol() To only permit protocols in the URL set 2223 * via $protocols or the common ones set in the function. 2224 * 2225 * @param string $url The URL to be cleaned. 2226 * @param array $protocols Optional. An array of acceptable protocols. 2227 * Defaults to 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet' if not set. 2228 * @param string $_context Private. Use esc_url_raw() for database usage. 2229 * @return string The cleaned $url after the 'clean_url' filter is applied. 2230 */ 2231 function esc_url( $url, $protocols = null, $_context = 'display' ) { 2232 $original_url = $url; 2233 2234 if ('' == $url) return $url; 2235 $url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%@$\|*\'()\\x80-\\xff]|i', '', $url); 2236 $strip = array('%0d', '%0a', '%0D', '%0A'); 2237 $url = _deep_replace($strip, $url); 2238 $url = str_replace(';//', '://', $url); 2239 /* If the URL doesn't appear to contain a scheme, we 2240 * presume it needs http:// appended (unless a relative 2241 * link starting with / or a php file). 2242 */ 2243 if ( strpos($url, ':') === false && 2244 substr( $url, 0, 1 ) != '/' && substr( $url, 0, 1 ) != '#' && !preg_match('/^[a-z0-9-]+?\.php/i', $url) ) 2245 $url = 'http://' . $url; 2246 2247 // Replace ampersands and single quotes only when displaying. 2248 if ( 'display' == $_context ) { 2249 $url = preg_replace('/&([^#])(?![a-z]{2,8};)/', '&$1', $url); 2250 $url = str_replace( "'", ''', $url ); 2251 } 2252 2253 if ( !is_array($protocols) ) 2254 $protocols = array('http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet'); 2255 if ( wp_kses_bad_protocol( $url, $protocols ) != $url ) 2256 return ''; 2257 2258 return apply_filters('clean_url', $url, $original_url, $_context); 2259 } 2260 2261 /** 2262 * Performs esc_url() for database usage. 2263 * 2264 * @since 2.8.0 2265 * @uses esc_url() 2266 * 2267 * @param string $url The URL to be cleaned. 2268 * @param array $protocols An array of acceptable protocols. 2269 * @return string The cleaned URL. 2270 */ 2271 function esc_url_raw( $url, $protocols = null ) { 2272 return esc_url( $url, $protocols, 'db' ); 2273 } 2274 2275 /** 2276 * Convert entities, while preserving already-encoded entities. 2277 * 2278 * @link http://www.php.net/htmlentities Borrowed from the PHP Manual user notes. 2279 * 2280 * @since 1.2.2 2281 * 2282 * @param string $myHTML The text to be converted. 2283 * @return string Converted text. 2284 */ 2285 function htmlentities2($myHTML) { 2286 $translation_table = get_html_translation_table( HTML_ENTITIES, ENT_QUOTES ); 2287 $translation_table[chr(38)] = '&'; 2288 return preg_replace( "/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,3};)/", "&", strtr($myHTML, $translation_table) ); 2289 } 2290 2291 /** 2292 * Escape single quotes, htmlspecialchar " < > &, and fix line endings. 2293 * 2294 * Escapes text strings for echoing in JS. It is intended to be used for inline JS 2295 * (in a tag attribute, for example onclick="..."). Note that the strings have to 2296 * be in single quotes. The filter 'js_escape' is also applied here. 2297 * 2298 * @since 2.8.0 2299 * 2300 * @param string $text The text to be escaped. 2301 * @return string Escaped text. 2302 */ 2303 function esc_js( $text ) { 2304 $safe_text = wp_check_invalid_utf8( $text ); 2305 $safe_text = _wp_specialchars( $safe_text, ENT_COMPAT ); 2306 $safe_text = preg_replace( '/&#(x)?0*(?(1)27|39);?/i', "'", stripslashes( $safe_text ) ); 2307 $safe_text = str_replace( "\r", '', $safe_text ); 2308 $safe_text = str_replace( "\n", '\\n', addslashes( $safe_text ) ); 2309 return apply_filters( 'js_escape', $safe_text, $text ); 2310 } 2311 2312 /** 2313 * Escaping for HTML blocks. 2314 * 2315 * @since 2.8.0 2316 * 2317 * @param string $text 2318 * @return string 2319 */ 2320 function esc_html( $text ) { 2321 $safe_text = wp_check_invalid_utf8( $text ); 2322 $safe_text = _wp_specialchars( $safe_text, ENT_QUOTES ); 2323 return apply_filters( 'esc_html', $safe_text, $text ); 2324 } 2325 2326 /** 2327 * Escaping for HTML attributes. 2328 * 2329 * @since 2.8.0 2330 * 2331 * @param string $text 2332 * @return string 2333 */ 2334 function esc_attr( $text ) { 2335 $safe_text = wp_check_invalid_utf8( $text ); 2336 $safe_text = _wp_specialchars( $safe_text, ENT_QUOTES ); 2337 return apply_filters( 'attribute_escape', $safe_text, $text ); 2338 } 2339 2340 /** 2341 * Escape a HTML tag name. 2342 * 2343 * @since 2.5.0 2344 * 2345 * @param string $tag_name 2346 * @return string 2347 */ 2348 function tag_escape($tag_name) { 2349 $safe_tag = strtolower( preg_replace('/[^a-zA-Z_:]/', '', $tag_name) ); 2350 return apply_filters('tag_escape', $safe_tag, $tag_name); 2351 } 2352 2353 /** 2354 * Escapes text for SQL LIKE special characters % and _. 2355 * 2356 * @since 2.5.0 2357 * 2358 * @param string $text The text to be escaped. 2359 * @return string text, safe for inclusion in LIKE query. 2360 */ 2361 function like_escape($text) { 2362 return str_replace(array("%", "_"), array("\\%", "\\_"), $text); 2363 } 2364 2365 /** 2366 * Convert full URL paths to absolute paths. 2367 * 2368 * Removes the http or https protocols and the domain. Keeps the path '/' at the 2369 * beginning, so it isn't a true relative link, but from the web root base. 2370 * 2371 * @since 2.1.0 2372 * 2373 * @param string $link Full URL path. 2374 * @return string Absolute path. 2375 */ 2376 function wp_make_link_relative( $link ) { 2377 return preg_replace( '|https?://[^/]+(/.*)|i', '$1', $link ); 2378 } 2379 2380 /** 2381 * Sanitises various option values based on the nature of the option. 2382 * 2383 * This is basically a switch statement which will pass $value through a number 2384 * of functions depending on the $option. 2385 * 2386 * @since 2.0.5 2387 * 2388 * @param string $option The name of the option. 2389 * @param string $value The unsanitised value. 2390 * @return string Sanitized value. 2391 */ 2392 function sanitize_option($option, $value) { 2393 2394 switch ($option) { 2395 case 'admin_email': 2396 $value = sanitize_email($value); 2397 if ( !$value && function_exists('add_settings_error') ) 2398 add_settings_error('admin_email', 'invalid_admin_email', __('The E-Mail Address submitted was not in the right format. Please enter a valid Email Address')); 2399 break; 2400 2401 case 'thumbnail_size_w': 2402 case 'thumbnail_size_h': 2403 case 'medium_size_w': 2404 case 'medium_size_h': 2405 case 'large_size_w': 2406 case 'large_size_h': 2407 case 'embed_size_h': 2408 case 'default_post_edit_rows': 2409 case 'mailserver_port': 2410 case 'comment_max_links': 2411 case 'page_on_front': 2412 case 'rss_excerpt_length': 2413 case 'default_category': 2414 case 'default_email_category': 2415 case 'default_link_category': 2416 case 'close_comments_days_old': 2417 case 'comments_per_page': 2418 case 'thread_comments_depth': 2419 case 'users_can_register': 2420 case 'start_of_week': 2421 $value = absint( $value ); 2422 break; 2423 2424 case 'embed_size_w': 2425 if ( '' !== $value ) 2426 $value = absint( $value ); 2427 break; 2428 2429 case 'posts_per_page': 2430 case 'posts_per_rss': 2431 $value = (int) $value; 2432 if ( empty($value) ) $value = 1; 2433 if ( $value < -1 ) $value = abs($value); 2434 break; 2435 2436 case 'default_ping_status': 2437 case 'default_comment_status': 2438 // Options that if not there have 0 value but need to be something like "closed" 2439 if ( $value == '0' || $value == '') 2440 $value = 'closed'; 2441 break; 2442 2443 case 'blogdescription': 2444 case 'blogname': 2445 $value = addslashes($value); 2446 $value = wp_filter_post_kses( $value ); // calls stripslashes then addslashes 2447 $value = stripslashes($value); 2448 $value = esc_html( $value ); 2449 break; 2450 2451 case 'blog_charset': 2452 $value = preg_replace('/[^a-zA-Z0-9_-]/', '', $value); // strips slashes 2453 break; 2454 2455 case 'date_format': 2456 case 'time_format': 2457 case 'mailserver_url': 2458 case 'mailserver_login': 2459 case 'mailserver_pass': 2460 case 'ping_sites': 2461 case 'upload_path': 2462 $value = strip_tags($value); 2463 $value = addslashes($value); 2464 $value = wp_filter_kses($value); // calls stripslashes then addslashes 2465 $value = stripslashes($value); 2466 break; 2467 2468 case 'gmt_offset': 2469 $value = preg_replace('/[^0-9:.-]/', '', $value); // strips slashes 2470 break; 2471 2472 case 'siteurl': 2473 case 'home': 2474 $value = esc_url_raw($value); 2475 break; 2476 default : 2477 $value = apply_filters("sanitize_option_{$option}", $value, $option); 2478 break; 2479 } 2480 2481 return $value; 2482 } 2483 2484 /** 2485 * Parses a string into variables to be stored in an array. 2486 * 2487 * Uses {@link http://www.php.net/parse_str parse_str()} and stripslashes if 2488 * {@link http://www.php.net/magic_quotes magic_quotes_gpc} is on. 2489 * 2490 * @since 2.2.1 2491 * @uses apply_filters() for the 'wp_parse_str' filter. 2492 * 2493 * @param string $string The string to be parsed. 2494 * @param array $array Variables will be stored in this array. 2495 */ 2496 function wp_parse_str( $string, &$array ) { 2497 parse_str( $string, $array ); 2498 if ( get_magic_quotes_gpc() ) 2499 $array = stripslashes_deep( $array ); 2500 $array = apply_filters( 'wp_parse_str', $array ); 2501 } 2502 2503 /** 2504 * Convert lone less than signs. 2505 * 2506 * KSES already converts lone greater than signs. 2507 * 2508 * @uses wp_pre_kses_less_than_callback in the callback function. 2509 * @since 2.3.0 2510 * 2511 * @param string $text Text to be converted. 2512 * @return string Converted text. 2513 */ 2514 function wp_pre_kses_less_than( $text ) { 2515 return preg_replace_callback('%<[^>]*?((?=<)|>|$)%', 'wp_pre_kses_less_than_callback', $text); 2516 } 2517 2518 /** 2519 * Callback function used by preg_replace. 2520 * 2521 * @uses esc_html to format the $matches text. 2522 * @since 2.3.0 2523 * 2524 * @param array $matches Populated by matches to preg_replace. 2525 * @return string The text returned after esc_html if needed. 2526 */ 2527 function wp_pre_kses_less_than_callback( $matches ) { 2528 if ( false === strpos($matches[0], '>') ) 2529 return esc_html($matches[0]); 2530 return $matches[0]; 2531 } 2532 2533 /** 2534 * WordPress implementation of PHP sprintf() with filters. 2535 * 2536 * @since 2.5.0 2537 * @link http://www.php.net/sprintf 2538 * 2539 * @param string $pattern The string which formatted args are inserted. 2540 * @param mixed $args,... Arguments to be formatted into the $pattern string. 2541 * @return string The formatted string. 2542 */ 2543 function wp_sprintf( $pattern ) { 2544 $args = func_get_args( ); 2545 $len = strlen($pattern); 2546 $start = 0; 2547 $result = ''; 2548 $arg_index = 0; 2549 while ( $len > $start ) { 2550 // Last character: append and break 2551 if ( strlen($pattern) - 1 == $start ) { 2552 $result .= substr($pattern, -1); 2553 break; 2554 } 2555 2556 // Literal %: append and continue 2557 if ( substr($pattern, $start, 2) == '%%' ) { 2558 $start += 2; 2559 $result .= '%'; 2560 continue; 2561 } 2562 2563 // Get fragment before next % 2564 $end = strpos($pattern, '%', $start + 1); 2565 if ( false === $end ) 2566 $end = $len; 2567 $fragment = substr($pattern, $start, $end - $start); 2568 2569 // Fragment has a specifier 2570 if ( $pattern{$start} == '%' ) { 2571 // Find numbered arguments or take the next one in order 2572 if ( preg_match('/^%(\d+)\$/', $fragment, $matches) ) { 2573 $arg = isset($args[$matches[1]]) ? $args[$matches[1]] : ''; 2574 $fragment = str_replace("%{$matches[1]}$", '%', $fragment); 2575 } else { 2576 ++$arg_index; 2577 $arg = isset($args[$arg_index]) ? $args[$arg_index] : ''; 2578 } 2579 2580 // Apply filters OR sprintf 2581 $_fragment = apply_filters( 'wp_sprintf', $fragment, $arg ); 2582 if ( $_fragment != $fragment ) 2583 $fragment = $_fragment; 2584 else 2585 $fragment = sprintf($fragment, strval($arg) ); 2586 } 2587 2588 // Append to result and move to next fragment 2589 $result .= $fragment; 2590 $start = $end; 2591 } 2592 return $result; 2593 } 2594 2595 /** 2596 * Localize list items before the rest of the content. 2597 * 2598 * The '%l' must be at the first characters can then contain the rest of the 2599 * content. The list items will have ', ', ', and', and ' and ' added depending 2600 * on the amount of list items in the $args parameter. 2601 * 2602 * @since 2.5.0 2603 * 2604 * @param string $pattern Content containing '%l' at the beginning. 2605 * @param array $args List items to prepend to the content and replace '%l'. 2606 * @return string Localized list items and rest of the content. 2607 */ 2608 function wp_sprintf_l($pattern, $args) { 2609 // Not a match 2610 if ( substr($pattern, 0, 2) != '%l' ) 2611 return $pattern; 2612 2613 // Nothing to work with 2614 if ( empty($args) ) 2615 return ''; 2616 2617 // Translate and filter the delimiter set (avoid ampersands and entities here) 2618 $l = apply_filters('wp_sprintf_l', array( 2619 /* translators: used between list items, there is a space after the coma */ 2620 'between' => __(', '), 2621 /* translators: used between list items, there is a space after the and */ 2622 'between_last_two' => __(', and '), 2623 /* translators: used between only two list items, there is a space after the and */ 2624 'between_only_two' => __(' and '), 2625 )); 2626 2627 $args = (array) $args; 2628 $result = array_shift($args); 2629 if ( count($args) == 1 ) 2630 $result .= $l['between_only_two'] . array_shift($args); 2631 // Loop when more than two args 2632 $i = count($args); 2633 while ( $i ) { 2634 $arg = array_shift($args); 2635 $i--; 2636 if ( 0 == $i ) 2637 $result .= $l['between_last_two'] . $arg; 2638 else 2639 $result .= $l['between'] . $arg; 2640 } 2641 return $result . substr($pattern, 2); 2642 } 2643 2644 /** 2645 * Safely extracts not more than the first $count characters from html string. 2646 * 2647 * UTF-8, tags and entities safe prefix extraction. Entities inside will *NOT* 2648 * be counted as one character. For example & will be counted as 4, < as 2649 * 3, etc. 2650 * 2651 * @since 2.5.0 2652 * 2653 * @param integer $str String to get the excerpt from. 2654 * @param integer $count Maximum number of characters to take. 2655 * @return string The excerpt. 2656 */ 2657 function wp_html_excerpt( $str, $count ) { 2658 $str = wp_strip_all_tags( $str, true ); 2659 $str = mb_substr( $str, 0, $count ); 2660 // remove part of an entity at the end 2661 $str = preg_replace( '/&[^;\s]{0,6}$/', '', $str ); 2662 return $str; 2663 } 2664 2665 /** 2666 * Add a Base url to relative links in passed content. 2667 * 2668 * By default it supports the 'src' and 'href' attributes. However this can be 2669 * changed via the 3rd param. 2670 * 2671 * @since 2.7.0 2672 * 2673 * @param string $content String to search for links in. 2674 * @param string $base The base URL to prefix to links. 2675 * @param array $attrs The attributes which should be processed. 2676 * @return string The processed content. 2677 */ 2678 function links_add_base_url( $content, $base, $attrs = array('src', 'href') ) { 2679 $attrs = implode('|', (array)$attrs); 2680 return preg_replace_callback("!($attrs)=(['\"])(.+?)\\2!i", 2681 create_function('$m', 'return _links_add_base($m, "' . $base . '");'), 2682 $content); 2683 } 2684 2685 /** 2686 * Callback to add a base url to relative links in passed content. 2687 * 2688 * @since 2.7.0 2689 * @access private 2690 * 2691 * @param string $m The matched link. 2692 * @param string $base The base URL to prefix to links. 2693 * @return string The processed link. 2694 */ 2695 function _links_add_base($m, $base) { 2696 //1 = attribute name 2 = quotation mark 3 = URL 2697 return $m[1] . '=' . $m[2] . 2698 (strpos($m[3], 'http://') === false ? 2699 path_join($base, $m[3]) : 2700 $m[3]) 2701 . $m[2]; 2702 } 2703 2704 /** 2705 * Adds a Target attribute to all links in passed content. 2706 * 2707 * This function by default only applies to <a> tags, however this can be 2708 * modified by the 3rd param. 2709 * 2710 * <b>NOTE:</b> Any current target attributed will be striped and replaced. 2711 * 2712 * @since 2.7.0 2713 * 2714 * @param string $content String to search for links in. 2715 * @param string $target The Target to add to the links. 2716 * @param array $tags An array of tags to apply to. 2717 * @return string The processed content. 2718 */ 2719 function links_add_target( $content, $target = '_blank', $tags = array('a') ) { 2720 $tags = implode('|', (array)$tags); 2721 return preg_replace_callback("!<($tags)(.+?)>!i", 2722 create_function('$m', 'return _links_add_target($m, "' . $target . '");'), 2723 $content); 2724 } 2725 2726 /** 2727 * Callback to add a target attribute to all links in passed content. 2728 * 2729 * @since 2.7.0 2730 * @access private 2731 * 2732 * @param string $m The matched link. 2733 * @param string $target The Target to add to the links. 2734 * @return string The processed link. 2735 */ 2736 function _links_add_target( $m, $target ) { 2737 $tag = $m[1]; 2738 $link = preg_replace('|(target=[\'"](.*?)[\'"])|i', '', $m[2]); 2739 return '<' . $tag . $link . ' target="' . $target . '">'; 2740 } 2741 2742 // normalize EOL characters and strip duplicate whitespace 2743 function normalize_whitespace( $str ) { 2744 $str = trim($str); 2745 $str = str_replace("\r", "\n", $str); 2746 $str = preg_replace( array( '/\n+/', '/[ \t]+/' ), array( "\n", ' ' ), $str ); 2747 return $str; 2748 } 2749 2750 /** 2751 * Properly strip all HTML tags including script and style 2752 * 2753 * @since 2.9.0 2754 * 2755 * @param string $string String containing HTML tags 2756 * @param bool $remove_breaks optional Whether to remove left over line breaks and white space chars 2757 * @return string The processed string. 2758 */ 2759 function wp_strip_all_tags($string, $remove_breaks = false) { 2760 $string = preg_replace( '@<(script|style)[^>]*?>.*?</\\1>@si', '', $string ); 2761 $string = strip_tags($string); 2762 2763 if ( $remove_breaks ) 2764 $string = preg_replace('/[\r\n\t ]+/', ' ', $string); 2765 2766 return trim($string); 2767 } 2768 2769 /** 2770 * Sanitize a string from user input or from the db 2771 * 2772 * check for invalid UTF-8, 2773 * Convert single < characters to entity, 2774 * strip all tags, 2775 * remove line breaks, tabs and extra white space, 2776 * strip octets. 2777 * 2778 * @since 2.9.0 2779 * 2780 * @param string $str 2781 * @return string 2782 */ 2783 function sanitize_text_field($str) { 2784 $filtered = wp_check_invalid_utf8( $str ); 2785 2786 if ( strpos($filtered, '<') !== false ) { 2787 $filtered = wp_pre_kses_less_than( $filtered ); 2788 // This will strip extra whitespace for us. 2789 $filtered = wp_strip_all_tags( $filtered, true ); 2790 } else { 2791 $filtered = trim( preg_replace('/[\r\n\t ]+/', ' ', $filtered) ); 2792 } 2793 2794 $match = array(); 2795 $found = false; 2796 while ( preg_match('/%[a-f0-9]{2}/i', $filtered, $match) ) { 2797 $filtered = str_replace($match[0], '', $filtered); 2798 $found = true; 2799 } 2800 2801 if ( $found ) { 2802 // Strip out the whitespace that may now exist after removing the octets. 2803 $filtered = trim( preg_replace('/ +/', ' ', $filtered) ); 2804 } 2805 2806 return apply_filters('sanitize_text_field', $filtered, $str); 2807 } 2808 2809 ?>
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| Generated: Mon Apr 5 14:26:09 2010 | Cross-referenced by PHPXref 0.7 |
