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 	$output = '';

    32 	$curl = '';

    33 	$textarr = preg_split('/(<.*>|\[.*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE);

    34 	$stop = count($textarr);

    35 	

    36 	/* translators: opening curly quote */

    37 	$opening_quote = _x('“', 'opening curly quote');

    38 	/* translators: closing curly quote */

    39 	$closing_quote = _x('”', 'closing curly quote');

    40 	

    41 	$no_texturize_tags = apply_filters('no_texturize_tags', array('pre', 'code', 'kbd', 'style', 'script', 'tt'));

    42 	$no_texturize_shortcodes = apply_filters('no_texturize_shortcodes', array('code'));

    43 	$no_texturize_tags_stack = array();

    44 	$no_texturize_shortcodes_stack = array();

    45 

    46 	// if a plugin has provided an autocorrect array, use it

    47 	if ( isset($wp_cockneyreplace) ) {

    48 		$cockney = array_keys($wp_cockneyreplace);

    49 		$cockneyreplace = array_values($wp_cockneyreplace);

    50 	} else {

    51 		$cockney = array("'tain't","'twere","'twas","'tis","'twill","'til","'bout","'nuff","'round","'cause");

    52 		$cockneyreplace = array("’tain’t","’twere","’twas","’tis","’twill","’til","’bout","’nuff","’round","’cause");

    53 	}

    54 

    55 	$static_characters = array_merge(array('---', ' -- ', '--', ' - ', 'xn–', '...', '``', '\'s', '\'\'', ' (tm)'), $cockney);

    56 	$static_replacements = array_merge(array('—', ' — ', '–', ' – ', 'xn--', '…', $opening_quote, '’s', $closing_quote, ' ™'), $cockneyreplace);

    57 

    58 	$dynamic_characters = array('/\'(\d\d(?:’|\')?s)/', '/(\s|\A|")\'/', '/(\d+)"/', '/(\d+)\'/', '/(\S)\'([^\'\s])/', '/(\s|\A)"(?!\s)/', '/"(\s|\S|\Z)/', '/\'([\s.]|\Z)/', '/(\d+)x(\d+)/');

    59 	$dynamic_replacements = array('’$1','$1‘', '$1″', '$1′', '$1’$2', '$1' . $opening_quote . '$2', $closing_quote . '$1', '’$1', '$1×$2');

    60 

    61 	for ( $i = 0; $i < $stop; $i++ ) {

    62 		$curl = $textarr[$i];

    63 

    64 		if ( !empty($curl) && '<' != $curl{0} && '[' != $curl{0}

    65 				&& empty($no_texturize_shortcodes_stack) && empty($no_texturize_tags_stack)) { // If it's not a tag

    66 			// static strings

    67 			$curl = str_replace($static_characters, $static_replacements, $curl);

    68 			// regular expressions

    69 			$curl = preg_replace($dynamic_characters, $dynamic_replacements, $curl);

    70 		} else {

    71 			wptexturize_pushpop_element($curl, $no_texturize_tags_stack, $no_texturize_tags, '<', '>');

    72 			wptexturize_pushpop_element($curl, $no_texturize_shortcodes_stack, $no_texturize_shortcodes, '[', ']');

    73 		}

    74 

    75 		$curl = preg_replace('/&([^#])(?![a-zA-Z1-4]{1,8};)/', '&$1', $curl);

    76 		$output .= $curl;

    77 	}

    78 

    79 	return $output;

    80 }

    81 

    82 function wptexturize_pushpop_element($text, &$stack, $disabled_elements, $opening = '<', $closing = '>') {

    83 	$o = preg_quote($opening, '/');

    84 	$c = preg_quote($closing, '/');

    85 	foreach($disabled_elements as $element) {

    86 		if (preg_match('/^'.$o.$element.'\b/', $text)) array_push($stack, $element);

    87 		if (preg_match('/^'.$o.'\/'.$element.$c.'/', $text)) {

    88 			$last = array_pop($stack);

    89 			// disable texturize until we find a closing tag of our type (e.g. <pre>)

    90 			// even if there was invalid nesting before that

    91 			// Example: in the case <pre>sadsadasd</code>"baba"</pre> "baba" won't be texturized

    92 			if ($last != $element) array_push($stack, $last);

    93 		}

    94 	}

    95 }

    96 

    97 /**

    98  * Accepts matches array from preg_replace_callback in wpautop() or a string.

    99  *

   100  * Ensures that the contents of a <<pre>>...<</pre>> HTML block are not

   101  * converted into paragraphs or line-breaks.

   102  *

   103  * @since 1.2.0

   104  *

   105  * @param array|string $matches The array or string

   106  * @return string The pre block without paragraph/line-break conversion.

   107  */

   108 function clean_pre($matches) {

   109 	if ( is_array($matches) )

   110 		$text = $matches[1] . $matches[2] . "</pre>";

   111 	else

   112 		$text = $matches;

   113 

   114 	$text = str_replace('<br />', '', $text);

   115 	$text = str_replace('<p>', "\n", $text);

   116 	$text = str_replace('</p>', '', $text);

   117 

   118 	return $text;

   119 }

   120 

   121 /**

   122  * Replaces double line-breaks with paragraph elements.

   123  *

   124  * A group of regex replaces used to identify text formatted with newlines and

   125  * replace double line-breaks with HTML paragraph tags. The remaining

   126  * line-breaks after conversion become <<br />> tags, unless $br is set to '0'

   127  * or 'false'.

   128  *

   129  * @since 0.71

   130  *

   131  * @param string $pee The text which has to be formatted.

   132  * @param int|bool $br Optional. If set, this will convert all remaining line-breaks after paragraphing. Default true.

   133  * @return string Text which has been converted into correct paragraph tags.

   134  */

   135 function wpautop($pee, $br = 1) {

   136 	if ( trim($pee) === '' )

   137 		return '';

   138 	$pee = $pee . "\n"; // just to make things a little easier, pad the end

   139 	$pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee);

   140 	// Space things out a little

   141 	$allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|form|map|area|blockquote|address|math|style|input|p|h[1-6]|hr)';

   142 	$pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee);

   143 	$pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee);

   144 	$pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines

   145 	if ( strpos($pee, '<object') !== false ) {

   146 		$pee = preg_replace('|\s*<param([^>]*)>\s*|', "<param$1>", $pee); // no pee inside object/embed

   147 		$pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee);

   148 	}

   149 	$pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates

   150 	// make paragraphs, including one at the end

   151 	$pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY);

   152 	$pee = '';

   153 	foreach ( $pees as $tinkle )

   154 		$pee .= '<p>' . trim($tinkle, "\n") . "</p>\n";

   155 	$pee = preg_replace('|<p>\s*</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace

   156 	$pee = preg_replace('!<p>([^<]+)</(div|address|form)>!', "<p>$1</p></$2>", $pee);

   157 	$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag

   158 	$pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem with nested lists

   159 	$pee = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee);

   160 	$pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee);

   161 	$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee);

   162 	$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee);

   163 	if ($br) {

   164 		$pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', create_function('$matches', 'return str_replace("\n", "<WPPreserveNewline />", $matches[0]);'), $pee);

   165 		$pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee); // optionally make line breaks

   166 		$pee = str_replace('<WPPreserveNewline />', "\n", $pee);

   167 	}

   168 	$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee);

   169 	$pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee);

   170 	if (strpos($pee, '<pre') !== false)

   171 		$pee = preg_replace_callback('!(<pre[^>]*>)(.*?)</pre>!is', 'clean_pre', $pee );

   172 	$pee = preg_replace( "|\n</p>$|", '</p>', $pee );

   173 	$pee = preg_replace('/<p>\s*?(' . get_shortcode_regex() . ')\s*<\/p>/s', '$1', $pee); // don't auto-p wrap shortcodes that stand alone

   174 

   175 	return $pee;

   176 }

   177 

   178 /**

   179  * Checks to see if a string is utf8 encoded.

   180  *

   181  * NOTE: This function checks for 5-Byte sequences, UTF8

   182  *       has Bytes Sequences with a maximum length of 4.

   183  *

   184  * @author bmorel at ssi dot fr (modified)

   185  * @since 1.2.1

   186  *

   187  * @param string $str The string to be checked

   188  * @return bool True if $str fits a UTF-8 model, false otherwise.

   189  */

   190 function seems_utf8($str) {

   191 	$length = strlen($str);

   192 	for ($i=0; $i < $length; $i++) {

   193 		$c = ord($str[$i]);

   194 		if ($c < 0x80) $n = 0; # 0bbbbbbb

   195 		elseif (($c & 0xE0) == 0xC0) $n=1; # 110bbbbb

   196 		elseif (($c & 0xF0) == 0xE0) $n=2; # 1110bbbb

   197 		elseif (($c & 0xF8) == 0xF0) $n=3; # 11110bbb

   198 		elseif (($c & 0xFC) == 0xF8) $n=4; # 111110bb

   199 		elseif (($c & 0xFE) == 0xFC) $n=5; # 1111110b

   200 		else return false; # Does not match any model

   201 		for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?

   202 			if ((++$i == $length) || ((ord($str[$i]) & 0xC0) != 0x80))

   203 				return false;

   204 		}

   205 	}

   206 	return true;

   207 }

   208 

   209 /**

   210  * Converts a number of special characters into their HTML entities.

   211  *

   212  * Specifically deals with: &, <, >, ", and '.

   213  *

   214  * $quote_style can be set to ENT_COMPAT to encode " to

   215  * ", or ENT_QUOTES to do both. Default is ENT_NOQUOTES where no quotes are encoded.

   216  *

   217  * @since 1.2.2

   218  *

   219  * @param string $string The text which is to be encoded.

   220  * @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.

   221  * @param string $charset Optional. The character encoding of the string. Default is false.

   222  * @param boolean $double_encode Optional. Whether or not to encode existing html entities. Default is false.

   223  * @return string The encoded text with HTML entities.

   224  */

   225 function _wp_specialchars( $string, $quote_style = ENT_NOQUOTES, $charset = false, $double_encode = false ) {

   226 	$string = (string) $string;

   227 

   228 	if ( 0 === strlen( $string ) ) {

   229 		return '';

   230 	}

   231 

   232 	// Don't bother if there are no specialchars - saves some processing

   233 	if ( !preg_match( '/[&<>"\']/', $string ) ) {

   234 		return $string;

   235 	}

   236 

   237 	// Account for the previous behaviour of the function when the $quote_style is not an accepted value

   238 	if ( empty( $quote_style ) ) {

   239 		$quote_style = ENT_NOQUOTES;

   240 	} elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) {

   241 		$quote_style = ENT_QUOTES;

   242 	}

   243 

   244 	// Store the site charset as a static to avoid multiple calls to wp_load_alloptions()

   245 	if ( !$charset ) {

   246 		static $_charset;

   247 		if ( !isset( $_charset ) ) {

   248 			$alloptions = wp_load_alloptions();

   249 			$_charset = isset( $alloptions['blog_charset'] ) ? $alloptions['blog_charset'] : '';

   250 		}

   251 		$charset = $_charset;

   252 	}

   253 	if ( in_array( $charset, array( 'utf8', 'utf-8', 'UTF8' ) ) ) {

   254 		$charset = 'UTF-8';

   255 	}

   256 

   257 	$_quote_style = $quote_style;

   258 

   259 	if ( $quote_style === 'double' ) {

   260 		$quote_style = ENT_COMPAT;

   261 		$_quote_style = ENT_COMPAT;

   262 	} elseif ( $quote_style === 'single' ) {

   263 		$quote_style = ENT_NOQUOTES;

   264 	}

   265 

   266 	// Handle double encoding ourselves

   267 	if ( !$double_encode ) {

   268 		$string = wp_specialchars_decode( $string, $_quote_style );

   269 		$string = preg_replace( '/&(#?x?[0-9a-z]+);/i', '|wp_entity|$1|/wp_entity|', $string );

   270 	}

   271 

   272 	$string = @htmlspecialchars( $string, $quote_style, $charset );

   273 

   274 	// Handle double encoding ourselves

   275 	if ( !$double_encode ) {

   276 		$string = str_replace( array( '|wp_entity|', '|/wp_entity|' ), array( '&', ';' ), $string );

   277 	}

   278 

   279 	// Backwards compatibility

   280 	if ( 'single' === $_quote_style ) {

   281 		$string = str_replace( "'", ''', $string );

   282 	}

   283 

   284 	return $string;

   285 }

   286 

   287 /**

   288  * Converts a number of HTML entities into their special characters.

   289  *

   290  * Specifically deals with: &, <, >, ", and '.

   291  *

   292  * $quote_style can be set to ENT_COMPAT to decode " entities,

   293  * or ENT_QUOTES to do both " and '. Default is ENT_NOQUOTES where no quotes are decoded.

   294  *

   295  * @since 2.8

   296  *

   297  * @param string $string The text which is to be decoded.

   298  * @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.

   299  * @return string The decoded text without HTML entities.

   300  */

   301 function wp_specialchars_decode( $string, $quote_style = ENT_NOQUOTES ) {

   302 	$string = (string) $string;

   303 

   304 	if ( 0 === strlen( $string ) ) {

   305 		return '';

   306 	}

   307 

   308 	// Don't bother if there are no entities - saves a lot of processing

   309 	if ( strpos( $string, '&' ) === false ) {

   310 		return $string;

   311 	}

   312 

   313 	// Match the previous behaviour of _wp_specialchars() when the $quote_style is not an accepted value

   314 	if ( empty( $quote_style ) ) {

   315 		$quote_style = ENT_NOQUOTES;

   316 	} elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) {

   317 		$quote_style = ENT_QUOTES;

   318 	}

   319 

   320 	// More complete than get_html_translation_table( HTML_SPECIALCHARS )

   321 	$single = array( '''  => '\'', ''' => '\'' );

   322 	$single_preg = array( '/&#0*39;/'  => ''', '/&#x0*27;/i' => ''' );

   323 	$double = array( '"' => '"', '"'  => '"', '"' => '"' );

   324 	$double_preg = array( '/&#0*34;/'  => '"', '/&#x0*22;/i' => '"' );

   325 	$others = array( '&lt;'   => '<', '&#060;'  => '<', '&gt;'   => '>', '&#062;'  => '>', '&amp;'  => '&', '&#038;'  => '&', '&#x26;' => '&' );

   326 	$others_preg = array( '/&#0*60;/'  => '<', '/&#0*62;/'  => '>', '/&#0*38;/'  => '&', '/&#x0*26;/i' => '&' );

   327 

   328 	if ( $quote_style === ENT_QUOTES ) {

   329 		$translation = array_merge( $single, $double, $others );

   330 		$translation_preg = array_merge( $single_preg, $double_preg, $others_preg );

   331 	} elseif ( $quote_style === ENT_COMPAT || $quote_style === 'double' ) {

   332 		$translation = array_merge( $double, $others );

   333 		$translation_preg = array_merge( $double_preg, $others_preg );

   334 	} elseif ( $quote_style === 'single' ) {

   335 		$translation = array_merge( $single, $others );

   336 		$translation_preg = array_merge( $single_preg, $others_preg );

   337 	} elseif ( $quote_style === ENT_NOQUOTES ) {

   338 		$translation = $others;

   339 		$translation_preg = $others_preg;

   340 	}

   341 

   342 	// Remove zero padding on numeric entities

   343 	$string = preg_replace( array_keys( $translation_preg ), array_values( $translation_preg ), $string );

   344 

   345 	// Replace characters according to translation table

   346 	return strtr( $string, $translation );

   347 }

   348 

   349 /**

   350  * Checks for invalid UTF8 in a string.

   351  *

   352  * @since 2.8

   353  *

   354  * @param string $string The text which is to be checked.

   355  * @param boolean $strip Optional. Whether to attempt to strip out invalid UTF8. Default is false.

   356  * @return string The checked text.

   357  */

   358 function wp_check_invalid_utf8( $string, $strip = false ) {

   359 	$string = (string) $string;

   360 

   361 	if ( 0 === strlen( $string ) ) {

   362 		return '';

   363 	}

   364 

   365 	// Store the site charset as a static to avoid multiple calls to get_option()

   366 	static $is_utf8;

   367 	if ( !isset( $is_utf8 ) ) {

   368 		$is_utf8 = in_array( get_option( 'blog_charset' ), array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) );

   369 	}

   370 	if ( !$is_utf8 ) {

   371 		return $string;

   372 	}

   373 

   374 	// Check for support for utf8 in the installed PCRE library once and store the result in a static

   375 	static $utf8_pcre;

   376 	if ( !isset( $utf8_pcre ) ) {

   377 		$utf8_pcre = @preg_match( '/^./u', 'a' );

   378 	}

   379 	// We can't demand utf8 in the PCRE installation, so just return the string in those cases

   380 	if ( !$utf8_pcre ) {

   381 		return $string;

   382 	}

   383 

   384 	// preg_match fails when it encounters invalid UTF8 in $string

   385 	if ( 1 === @preg_match( '/^./us', $string ) ) {

   386 		return $string;

   387 	}

   388 

   389 	// Attempt to strip the bad chars if requested (not recommended)

   390 	if ( $strip && function_exists( 'iconv' ) ) {

   391 		return iconv( 'utf-8', 'utf-8', $string );

   392 	}

   393 

   394 	return '';

   395 }

   396 

   397 /**

   398  * Encode the Unicode values to be used in the URI.

   399  *

   400  * @since 1.5.0

   401  *

   402  * @param string $utf8_string

   403  * @param int $length Max length of the string

   404  * @return string String with Unicode encoded for URI.

   405  */

   406 function utf8_uri_encode( $utf8_string, $length = 0 ) {

   407 	$unicode = '';

   408 	$values = array();

   409 	$num_octets = 1;

   410 	$unicode_length = 0;

   411 

   412 	$string_length = strlen( $utf8_string );

   413 	for ($i = 0; $i < $string_length; $i++ ) {

   414 

   415 		$value = ord( $utf8_string[ $i ] );

   416 

   417 		if ( $value < 128 ) {

   418 			if ( $length && ( $unicode_length >= $length ) )

   419 				break;

   420 			$unicode .= chr($value);

   421 			$unicode_length++;

   422 		} else {

   423 			if ( count( $values ) == 0 ) $num_octets = ( $value < 224 ) ? 2 : 3;

   424 

   425 			$values[] = $value;

   426 

   427 			if ( $length && ( $unicode_length + ($num_octets * 3) ) > $length )

   428 				break;

   429 			if ( count( $values ) == $num_octets ) {

   430 				if ($num_octets == 3) {

   431 					$unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]) . '%' . dechex($values[2]);

   432 					$unicode_length += 9;

   433 				} else {

   434 					$unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]);

   435 					$unicode_length += 6;

   436 				}

   437 

   438 				$values = array();

   439 				$num_octets = 1;

   440 			}

   441 		}

   442 	}

   443 

   444 	return $unicode;

   445 }

   446 

   447 /**

   448  * Converts all accent characters to ASCII characters.

   449  *

   450  * If there are no accent characters, then the string given is just returned.

   451  *

   452  * @since 1.2.1

   453  *

   454  * @param string $string Text that might have accent characters

   455  * @return string Filtered string with replaced "nice" characters.

   456  */

   457 function remove_accents($string) {

   458 	if ( !preg_match('/[\x80-\xff]/', $string) )

   459 		return $string;

   460 

   461 	if (seems_utf8($string)) {

   462 		$chars = array(

   463 		// Decompositions for Latin-1 Supplement

   464 		chr(195).chr(128) => 'A', chr(195).chr(129) => 'A',

   465 		chr(195).chr(130) => 'A', chr(195).chr(131) => 'A',

   466 		chr(195).chr(132) => 'A', chr(195).chr(133) => 'A',

   467 		chr(195).chr(135) => 'C', chr(195).chr(136) => 'E',

   468 		chr(195).chr(137) => 'E', chr(195).chr(138) => 'E',

   469 		chr(195).chr(139) => 'E', chr(195).chr(140) => 'I',

   470 		chr(195).chr(141) => 'I', chr(195).chr(142) => 'I',

   471 		chr(195).chr(143) => 'I', chr(195).chr(145) => 'N',

   472 		chr(195).chr(146) => 'O', chr(195).chr(147) => 'O',

   473 		chr(195).chr(148) => 'O', chr(195).chr(149) => 'O',

   474 		chr(195).chr(150) => 'O', chr(195).chr(153) => 'U',

   475 		chr(195).chr(154) => 'U', chr(195).chr(155) => 'U',

   476 		chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y',

   477 		chr(195).chr(159) => 's', chr(195).chr(160) => 'a',

   478 		chr(195).chr(161) => 'a', chr(195).chr(162) => 'a',

   479 		chr(195).chr(163) => 'a', chr(195).chr(164) => 'a',

   480 		chr(195).chr(165) => 'a', chr(195).chr(167) => 'c',

   481 		chr(195).chr(168) => 'e', chr(195).chr(169) => 'e',

   482 		chr(195).chr(170) => 'e', chr(195).chr(171) => 'e',

   483 		chr(195).chr(172) => 'i', chr(195).chr(173) => 'i',

   484 		chr(195).chr(174) => 'i', chr(195).chr(175) => 'i',

   485 		chr(195).chr(177) => 'n', chr(195).chr(178) => 'o',

   486 		chr(195).chr(179) => 'o', chr(195).chr(180) => 'o',

   487 		chr(195).chr(181) => 'o', chr(195).chr(182) => 'o',

   488 		chr(195).chr(182) => 'o', chr(195).chr(185) => 'u',

   489 		chr(195).chr(186) => 'u', chr(195).chr(187) => 'u',

   490 		chr(195).chr(188) => 'u', chr(195).chr(189) => 'y',

   491 		chr(195).chr(191) => 'y',

   492 		// Decompositions for Latin Extended-A

   493 		chr(196).chr(128) => 'A', chr(196).chr(129) => 'a',

   494 		chr(196).chr(130) => 'A', chr(196).chr(131) => 'a',

   495 		chr(196).chr(132) => 'A', chr(196).chr(133) => 'a',

   496 		chr(196).chr(134) => 'C', chr(196).chr(135) => 'c',

   497 		chr(196).chr(136) => 'C', chr(196).chr(137) => 'c',

   498 		chr(196).chr(138) => 'C', chr(196).chr(139) => 'c',

   499 		chr(196).chr(140) => 'C', chr(196).chr(141) => 'c',

   500 		chr(196).chr(142) => 'D', chr(196).chr(143) => 'd',

   501 		chr(196).chr(144) => 'D', chr(196).chr(145) => 'd',

   502 		chr(196).chr(146) => 'E', chr(196).chr(147) => 'e',

   503 		chr(196).chr(148) => 'E', chr(196).chr(149) => 'e',

   504 		chr(196).chr(150) => 'E', chr(196).chr(151) => 'e',

   505 		chr(196).chr(152) => 'E', chr(196).chr(153) => 'e',

   506 		chr(196).chr(154) => 'E', chr(196).chr(155) => 'e',

   507 		chr(196).chr(156) => 'G', chr(196).chr(157) => 'g',

   508 		chr(196).chr(158) => 'G', chr(196).chr(159) => 'g',

   509 		chr(196).chr(160) => 'G', chr(196).chr(161) => 'g',

   510 		chr(196).chr(162) => 'G', chr(196).chr(163) => 'g',

   511 		chr(196).chr(164) => 'H', chr(196).chr(165) => 'h',

   512 		chr(196).chr(166) => 'H', chr(196).chr(167) => 'h',

   513 		chr(196).chr(168) => 'I', chr(196).chr(169) => 'i',

   514 		chr(196).chr(170) => 'I', chr(196).chr(171) => 'i',

   515 		chr(196).chr(172) => 'I', chr(196).chr(173) => 'i',

   516 		chr(196).chr(174) => 'I', chr(196).chr(175) => 'i',

   517 		chr(196).chr(176) => 'I', chr(196).chr(177) => 'i',

   518 		chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij',

   519 		chr(196).chr(180) => 'J', chr(196).chr(181) => 'j',

   520 		chr(196).chr(182) => 'K', chr(196).chr(183) => 'k',

   521 		chr(196).chr(184) => 'k', chr(196).chr(185) => 'L',

   522 		chr(196).chr(186) => 'l', chr(196).chr(187) => 'L',

   523 		chr(196).chr(188) => 'l', chr(196).chr(189) => 'L',

   524 		chr(196).chr(190) => 'l', chr(196).chr(191) => 'L',

   525 		chr(197).chr(128) => 'l', chr(197).chr(129) => 'L',

   526 		chr(197).chr(130) => 'l', chr(197).chr(131) => 'N',

   527 		chr(197).chr(132) => 'n', chr(197).chr(133) => 'N',

   528 		chr(197).chr(134) => 'n', chr(197).chr(135) => 'N',

   529 		chr(197).chr(136) => 'n', chr(197).chr(137) => 'N',

   530 		chr(197).chr(138) => 'n', chr(197).chr(139) => 'N',

   531 		chr(197).chr(140) => 'O', chr(197).chr(141) => 'o',

   532 		chr(197).chr(142) => 'O', chr(197).chr(143) => 'o',

   533 		chr(197).chr(144) => 'O', chr(197).chr(145) => 'o',

   534 		chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe',

   535 		chr(197).chr(148) => 'R',chr(197).chr(149) => 'r',

   536 		chr(197).chr(150) => 'R',chr(197).chr(151) => 'r',

   537 		chr(197).chr(152) => 'R',chr(197).chr(153) => 'r',

   538 		chr(197).chr(154) => 'S',chr(197).chr(155) => 's',

   539 		chr(197).chr(156) => 'S',chr(197).chr(157) => 's',

   540 		chr(197).chr(158) => 'S',chr(197).chr(159) => 's',

   541 		chr(197).chr(160) => 'S', chr(197).chr(161) => 's',

   542 		chr(197).chr(162) => 'T', chr(197).chr(163) => 't',

   543 		chr(197).chr(164) => 'T', chr(197).chr(165) => 't',

   544 		chr(197).chr(166) => 'T', chr(197).chr(167) => 't',

   545 		chr(197).chr(168) => 'U', chr(197).chr(169) => 'u',

   546 		chr(197).chr(170) => 'U', chr(197).chr(171) => 'u',

   547 		chr(197).chr(172) => 'U', chr(197).chr(173) => 'u',

   548 		chr(197).chr(174) => 'U', chr(197).chr(175) => 'u',

   549 		chr(197).chr(176) => 'U', chr(197).chr(177) => 'u',

   550 		chr(197).chr(178) => 'U', chr(197).chr(179) => 'u',

   551 		chr(197).chr(180) => 'W', chr(197).chr(181) => 'w',

   552 		chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y',

   553 		chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z',

   554 		chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z',

   555 		chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z',

   556 		chr(197).chr(190) => 'z', chr(197).chr(191) => 's',

   557 		// Euro Sign

   558 		chr(226).chr(130).chr(172) => 'E',

   559 		// GBP (Pound) Sign

   560 		chr(194).chr(163) => '');

   561 

   562 		$string = strtr($string, $chars);

   563 	} else {

   564 		// Assume ISO-8859-1 if not UTF-8

   565 		$chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158)

   566 			.chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194)

   567 			.chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202)

   568 			.chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210)

   569 			.chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218)

   570 			.chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227)

   571 			.chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235)

   572 			.chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243)

   573 			.chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251)

   574 			.chr(252).chr(253).chr(255);

   575 

   576 		$chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy";

   577 

   578 		$string = strtr($string, $chars['in'], $chars['out']);

   579 		$double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254));

   580 		$double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th');

   581 		$string = str_replace($double_chars['in'], $double_chars['out'], $string);

   582 	}

   583 

   584 	return $string;

   585 }

   586 

   587 /**

   588  * Sanitizes a filename replacing whitespace with dashes

   589  *

   590  * Removes special characters that are illegal in filenames on certain

   591  * operating systems and special characters requiring special escaping

   592  * to manipulate at the command line. Replaces spaces and consecutive

   593  * dashes with a single dash. Trim period, dash and underscore from beginning

   594  * and end of filename.

   595  *

   596  * @since 2.1.0

   597  *

   598  * @param string $filename The filename to be sanitized

   599  * @return string The sanitized filename

   600  */

   601 function sanitize_file_name( $filename ) {

   602 	$filename_raw = $filename;

   603 	$special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", chr(0));

   604 	$special_chars = apply_filters('sanitize_file_name_chars', $special_chars, $filename_raw);

   605 	$filename = str_replace($special_chars, '', $filename);

   606 	$filename = preg_replace('/[\s-]+/', '-', $filename);

   607 	$filename = trim($filename, '.-_');

   608 

   609 	// Split the filename into a base and extension[s]

   610 	$parts = explode('.', $filename);

   611 

   612 	// Return if only one extension

   613 	if ( count($parts) <= 2 )

   614 		return apply_filters('sanitize_file_name', $filename, $filename_raw);

   615 

   616 	// Process multiple extensions

   617 	$filename = array_shift($parts);

   618 	$extension = array_pop($parts);

   619 	$mimes = get_allowed_mime_types();

   620 

   621 	// Loop over any intermediate extensions.  Munge them with a trailing underscore if they are a 2 - 5 character

   622 	// long alpha string not in the extension whitelist.

   623 	foreach ( (array) $parts as $part) {

   624 		$filename .= '.' . $part;

   625 		

   626 		if ( preg_match("/^[a-zA-Z]{2,5}\d?$/", $part) ) {

   627 			$allowed = false;

   628 			foreach ( $mimes as $ext_preg => $mime_match ) {

   629 				$ext_preg = '!(^' . $ext_preg . ')$!i';

   630 				if ( preg_match( $ext_preg, $part ) ) {

   631 					$allowed = true;

   632 					break;

   633 				}

   634 			}

   635 			if ( !$allowed )

   636 				$filename .= '_';

   637 		}

   638 	}

   639 	$filename .= '.' . $extension;

   640 

   641 	return apply_filters('sanitize_file_name', $filename, $filename_raw);

   642 }

   643 

   644 /**

   645  * Sanitize username stripping out unsafe characters.

   646  *

   647  * If $strict is true, only alphanumeric characters (as well as _, space, ., -,

   648  * @) are returned.

   649  * Removes tags, octets, entities, and if strict is enabled, will remove all

   650  * non-ASCII characters. After sanitizing, it passes the username, raw username

   651  * (the username in the parameter), and the strict parameter as parameters for

   652  * the filter.

   653  *

   654  * @since 2.0.0

   655  * @uses apply_filters() Calls 'sanitize_user' hook on username, raw username,

   656  *		and $strict parameter.

   657  *

   658  * @param string $username The username to be sanitized.

   659  * @param bool $strict If set limits $username to specific characters. Default false.

   660  * @return string The sanitized username, after passing through filters.

   661  */

   662 function sanitize_user( $username, $strict = false ) {

   663 	$raw_username = $username;

   664 	$username = strip_tags($username);

   665 	// Kill octets

   666 	$username = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '', $username);

   667 	$username = preg_replace('/&.+?;/', '', $username); // Kill entities

   668 

   669 	// If strict, reduce to ASCII for max portability.

   670 	if ( $strict )

   671 		$username = preg_replace('|[^a-z0-9 _.\-@]|i', '', $username);

   672 

   673 	// Consolidate contiguous whitespace

   674 	$username = preg_replace('|\s+|', ' ', $username);

   675 

   676 	return apply_filters('sanitize_user', $username, $raw_username, $strict);

   677 }

   678 

   679 /**

   680  * Sanitizes title or use fallback title.

   681  *

   682  * Specifically, HTML and PHP tags are stripped. Further actions can be added

   683  * via the plugin API. If $title is empty and $fallback_title is set, the latter

   684  * will be used.

   685  *

   686  * @since 1.0.0

   687  *

   688  * @param string $title The string to be sanitized.

   689  * @param string $fallback_title Optional. A title to use if $title is empty.

   690  * @return string The sanitized string.

   691  */

   692 function sanitize_title($title, $fallback_title = '') {

   693 	$raw_title = $title;

   694 	$title = strip_tags($title);

   695 	$title = apply_filters('sanitize_title', $title, $raw_title);

   696 

   697 	if ( '' === $title || false === $title )

   698 		$title = $fallback_title;

   699 

   700 	return $title;

   701 }

   702 

   703 /**

   704  * Sanitizes title, replacing whitespace with dashes.

   705  *

   706  * Limits the output to alphanumeric characters, underscore (_) and dash (-).

   707  * Whitespace becomes a dash.

   708  *

   709  * @since 1.2.0

   710  *

   711  * @param string $title The title to be sanitized.

   712  * @return string The sanitized title.

   713  */

   714 function sanitize_title_with_dashes($title) {

   715 	$title = strip_tags($title);

   716 	// Preserve escaped octets.

   717 	$title = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '---$1---', $title);

   718 	// Remove percent signs that are not part of an octet.

   719 	$title = str_replace('%', '', $title);

   720 	// Restore octets.

   721 	$title = preg_replace('|---([a-fA-F0-9][a-fA-F0-9])---|', '%$1', $title);

   722 

   723 	$title = remove_accents($title);

   724 	if (seems_utf8($title)) {

   725 		if (function_exists('mb_strtolower')) {

   726 			$title = mb_strtolower($title, 'UTF-8');

   727 		}

   728 		$title = utf8_uri_encode($title, 200);

   729 	}

   730 

   731 	$title = strtolower($title);

   732 	$title = preg_replace('/&.+?;/', '', $title); // kill entities

   733 	$title = str_replace('.', '-', $title);

   734 	$title = preg_replace('/[^%a-z0-9 _-]/', '', $title);

   735 	$title = preg_replace('/\s+/', '-', $title);

   736 	$title = preg_replace('|-+|', '-', $title);

   737 	$title = trim($title, '-');

   738 

   739 	return $title;

   740 }

   741 

   742 /**

   743  * Ensures a string is a valid SQL order by clause.

   744  *

   745  * Accepts one or more columns, with or without ASC/DESC, and also accepts

   746  * RAND().

   747  *

   748  * @since 2.5.1

   749  *

   750  * @param string $orderby Order by string to be checked.

   751  * @return string|false Returns the order by clause if it is a match, false otherwise.

   752  */

   753 function sanitize_sql_orderby( $orderby ){

   754 	preg_match('/^\s*([a-z0-9_]+(\s+(ASC|DESC))?(\s*,\s*|\s*$))+|^\s*RAND\(\s*\)\s*$/i', $orderby, $obmatches);

   755 	if ( !$obmatches )

   756 		return false;

   757 	return $orderby;

   758 }

   759 

   760 /**

   761  * Santizes a html classname to ensure it only contains valid characters

   762  *

   763  * Strips the string down to A-Z,a-z,0-9,'-' if this results in an empty

   764  * string then it will return the alternative value supplied.

   765  *

   766  * @todo Expand to support the full range of CDATA that a class attribute can contain.

   767  *

   768  * @since 2.8.0

   769  *

   770  * @param string $class The classname to be sanitized

   771  * @param string $fallback The value to return if the sanitization end's up as an empty string.

   772  * @return string The sanitized value

   773  */

   774 function sanitize_html_class($class, $fallback){

   775 	//Strip out any % encoded octets

   776 	$sanitized = preg_replace('|%[a-fA-F0-9][a-fA-F0-9]|', '', $class);

   777 

   778 	//Limit to A-Z,a-z,0-9,'-'

   779 	$sanitized = preg_replace('/[^A-Za-z0-9-]/', '', $sanitized);

   780 

   781 	if ('' == $sanitized)

   782 		$sanitized = $fallback;

   783 

   784 	return apply_filters('sanitize_html_class',$sanitized, $class, $fallback);

   785 }

   786 

   787 /**

   788  * Converts a number of characters from a string.

   789  *

   790  * Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are

   791  * converted into correct XHTML and Unicode characters are converted to the

   792  * valid range.

   793  *

   794  * @since 0.71

   795  *

   796  * @param string $content String of characters to be converted.

   797  * @param string $deprecated Not used.

   798  * @return string Converted string.

   799  */

   800 function convert_chars($content, $deprecated = '') {

   801 	// Translation of invalid Unicode references range to valid range

   802 	$wp_htmltranswinuni = array(

   803 	'€' => '€', // the Euro sign

   804 	'' => '',

   805 	'‚' => '‚', // these are Windows CP1252 specific characters

   806 	'ƒ' => 'ƒ',  // they would look weird on non-Windows browsers

   807 	'„' => '„',

   808 	'…' => '…',

   809 	'†' => '†',

   810 	'‡' => '‡',

   811 	'ˆ' => 'ˆ',

   812 	'‰' => '‰',

   813 	'Š' => 'Š',

   814 	'‹' => '‹',

   815 	'Œ' => 'Œ',

   816 	'' => '',

   817 	'Ž' => 'ž',

   818 	'' => '',

   819 	'' => '',

   820 	'‘' => '‘',

   821 	'’' => '’',

   822 	'“' => '“',

   823 	'”' => '”',

   824 	'•' => '•',

   825 	'–' => '–',

   826 	'—' => '—',

   827 	'˜' => '˜',

   828 	'™' => '™',

   829 	'š' => 'š',

   830 	'›' => '›',

   831 	'œ' => 'œ',

   832 	'' => '',

   833 	'ž' => '',

   834 	'Ÿ' => 'Ÿ'

   835 	);

   836 

   837 	// Remove metadata tags

   838 	$content = preg_replace('/<title>(.+?)<\/title>/','',$content);

   839 	$content = preg_replace('/<category>(.+?)<\/category>/','',$content);

   840 

   841 	// Converts lone & characters into & (a.k.a. &)

   842 	$content = preg_replace('/&([^#])(?![a-z1-4]{1,8};)/i', '&$1', $content);

   843 

   844 	// Fix Word pasting

   845 	$content = strtr($content, $wp_htmltranswinuni);

   846 

   847 	// Just a little XHTML help

   848 	$content = str_replace('<br>', '<br />', $content);

   849 	$content = str_replace('<hr>', '<hr />', $content);

   850 

   851 	return $content;

   852 }

   853 

   854 /**

   855  * Callback used to change %uXXXX to &#YYY; syntax

   856  *

   857  * @since 2.8?

   858  *

   859  * @param array $matches Single Match

   860  * @return string An HTML entity

   861  */

   862 function funky_javascript_callback($matches) {

   863 	return "&#".base_convert($matches[1],16,10).";";

   864 }

   865 

   866 /**

   867  * Fixes javascript bugs in browsers.

   868  *

   869  * Converts unicode characters to HTML numbered entities.

   870  *

   871  * @since 1.5.0

   872  * @uses $is_macIE

   873  * @uses $is_winIE

   874  *

   875  * @param string $text Text to be made safe.

   876  * @return string Fixed text.

   877  */

   878 function funky_javascript_fix($text) {

   879 	// Fixes for browsers' javascript bugs

   880 	global $is_macIE, $is_winIE;

   881 

   882 	if ( $is_winIE || $is_macIE )

   883 		$text =  preg_replace_callback("/\%u([0-9A-F]{4,4})/",

   884 					       "funky_javascript_callback",

   885 					       $text);

   886 

   887 	return $text;

   888 }

   889 

   890 /**

   891  * Will only balance the tags if forced to and the option is set to balance tags.

   892  *

   893  * The option 'use_balanceTags' is used for whether the tags will be balanced.

   894  * Both the $force parameter and 'use_balanceTags' option will have to be true

   895  * before the tags will be balanced.

   896  *

   897  * @since 0.71

   898  *

   899  * @param string $text Text to be balanced

   900  * @param bool $force Forces balancing, ignoring the value of the option. Default false.

   901  * @return string Balanced text

   902  */

   903 function balanceTags( $text, $force = false ) {

   904 	if ( !$force && get_option('use_balanceTags') == 0 )

   905 		return $text;

   906 	return force_balance_tags( $text );

   907 }

   908 

   909 /**

   910  * Balances tags of string using a modified stack.

   911  *

   912  * @since 2.0.4

   913  *

   914  * @author Leonard Lin <leonard@acm.org>

   915  * @license GPL v2.0

   916  * @copyright November 4, 2001

   917  * @version 1.1

   918  * @todo Make better - change loop condition to $text in 1.2

   919  * @internal Modified by Scott Reilly (coffee2code) 02 Aug 2004

   920  *		1.1  Fixed handling of append/stack pop order of end text

   921  *			 Added Cleaning Hooks

   922  *		1.0  First Version

   923  *

   924  * @param string $text Text to be balanced.

   925  * @return string Balanced text.

   926  */

   927 function force_balance_tags( $text ) {

   928 	$tagstack = array(); $stacksize = 0; $tagqueue = ''; $newtext = '';

   929 	$single_tags = array('br', 'hr', 'img', 'input'); //Known single-entity/self-closing tags

   930 	$nestable_tags = array('blockquote', 'div', 'span'); //Tags that can be immediately nested within themselves

   931 

   932 	# WP bug fix for comments - in case you REALLY meant to type '< !--'

   933 	$text = str_replace('< !--', '<    !--', $text);

   934 	# WP bug fix for LOVE <3 (and other situations with '<' before a number)

   935 	$text = preg_replace('#<([0-9]{1})#', '&lt;$1', $text);

   936 

   937 	while (preg_match("/<(\/?\w*)\s*([^>]*)>/",$text,$regex)) {

   938 		$newtext .= $tagqueue;

   939 

   940 		$i = strpos($text,$regex[0]);

   941 		$l = strlen($regex[0]);

   942 

   943 		// clear the shifter

   944 		$tagqueue = '';

   945 		// Pop or Push

   946 		if ( isset($regex[1][0]) && '/' == $regex[1][0] ) { // End Tag

   947 			$tag = strtolower(substr($regex[1],1));

   948 			// if too many closing tags

   949 			if($stacksize <= 0) {

   950 				$tag = '';

   951 				//or close to be safe $tag = '/' . $tag;

   952 			}

   953 			// if stacktop value = tag close value then pop

   954 			else if ($tagstack[$stacksize - 1] == $tag) { // found closing tag

   955 				$tag = '</' . $tag . '>'; // Close Tag

   956 				// Pop

   957 				array_pop ($tagstack);

   958 				$stacksize--;

   959 			} else { // closing tag not at top, search for it

   960 				for ($j=$stacksize-1;$j>=0;$j--) {

   961 					if ($tagstack[$j] == $tag) {

   962 					// add tag to tagqueue

   963 						for ($k=$stacksize-1;$k>=$j;$k--){

   964 							$tagqueue .= '</' . array_pop ($tagstack) . '>';

   965 							$stacksize--;

   966 						}

   967 						break;

   968 					}

   969 				}

   970 				$tag = '';

   971 			}

   972 		} else { // Begin Tag

   973 			$tag = strtolower($regex[1]);

   974 

   975 			// Tag Cleaning

   976 

   977 			// If self-closing or '', don't do anything.

   978 			if((substr($regex[2],-1) == '/') || ($tag == '')) {

   979 			}

   980 			// ElseIf it's a known single-entity tag but it doesn't close itself, do so

   981 			elseif ( in_array($tag, $single_tags) ) {

   982 				$regex[2] .= '/';

   983 			} else {	// Push the tag onto the stack

   984 				// If the top of the stack is the same as the tag we want to push, close previous tag

   985 				if (($stacksize > 0) && !in_array($tag, $nestable_tags) && ($tagstack[$stacksize - 1] == $tag)) {

   986 					$tagqueue = '</' . array_pop ($tagstack) . '>';

   987 					$stacksize--;

   988 				}

   989 				$stacksize = array_push ($tagstack, $tag);

   990 			}

   991 

   992 			// Attributes

   993 			$attributes = $regex[2];

   994 			if($attributes) {

   995 				$attributes = ' '.$attributes;

   996 			}

   997 			$tag = '<'.$tag.$attributes.'>';

   998 			//If already queuing a close tag, then put this tag on, too

   999 			if ($tagqueue) {

  1000 				$tagqueue .= $tag;

  1001 				$tag = '';

  1002 			}

  1003 		}

  1004 		$newtext .= substr($text,0,$i) . $tag;

  1005 		$text = substr($text,$i+$l);

  1006 	}

  1007 

  1008 	// Clear Tag Queue

  1009 	$newtext .= $tagqueue;

  1010 

  1011 	// Add Remaining text

  1012 	$newtext .= $text;

  1013 

  1014 	// Empty Stack

  1015 	while($x = array_pop($tagstack)) {

  1016 		$newtext .= '</' . $x . '>'; // Add remaining tags to close

  1017 	}

  1018 

  1019 	// WP fix for the bug with HTML comments

  1020 	$newtext = str_replace("< !--","<!--",$newtext);

  1021 	$newtext = str_replace("<    !--","< !--",$newtext);

  1022 

  1023 	return $newtext;

  1024 }

  1025 

  1026 /**

  1027  * Acts on text which is about to be edited.

  1028  *

  1029  * Unless $richedit is set, it is simply a holder for the 'format_to_edit'

  1030  * filter. If $richedit is set true htmlspecialchars() will be run on the

  1031  * content, converting special characters to HTMl entities.

  1032  *

  1033  * @since 0.71

  1034  *

  1035  * @param string $content The text about to be edited.

  1036  * @param bool $richedit Whether or not the $content should pass through htmlspecialchars(). Default false.

  1037  * @return string The text after the filter (and possibly htmlspecialchars()) has been run.

  1038  */

  1039 function format_to_edit($content, $richedit = false) {

  1040 	$content = apply_filters('format_to_edit', $content);

  1041 	if (! $richedit )

  1042 		$content = htmlspecialchars($content);

  1043 	return $content;

  1044 }

  1045 

  1046 /**

  1047  * Holder for the 'format_to_post' filter.

  1048  *

  1049  * @since 0.71

  1050  *

  1051  * @param string $content The text to pass through the filter.

  1052  * @return string Text returned from the 'format_to_post' filter.

  1053  */

  1054 function format_to_post($content) {

  1055 	$content = apply_filters('format_to_post', $content);

  1056 	return $content;

  1057 }

  1058 

  1059 /**

  1060  * Add leading zeros when necessary.

  1061  *

  1062  * If you set the threshold to '4' and the number is '10', then you will get

  1063  * back '0010'. If you set the number to '4' and the number is '5000', then you

  1064  * will get back '5000'.

  1065  *

  1066  * Uses sprintf to append the amount of zeros based on the $threshold parameter

  1067  * and the size of the number. If the number is large enough, then no zeros will

  1068  * be appended.

  1069  *

  1070  * @since 0.71

  1071  *

  1072  * @param mixed $number Number to append zeros to if not greater than threshold.

  1073  * @param int $threshold Digit places number needs to be to not have zeros added.

  1074  * @return string Adds leading zeros to number if needed.

  1075  */

  1076 function zeroise($number, $threshold) {

  1077 	return sprintf('%0'.$threshold.'s', $number);

  1078 }

  1079 

  1080 /**

  1081  * Adds backslashes before letters and before a number at the start of a string.

  1082  *

  1083  * @since 0.71

  1084  *

  1085  * @param string $string Value to which backslashes will be added.

  1086  * @return string String with backslashes inserted.

  1087  */

  1088 function backslashit($string) {

  1089 	$string = preg_replace('/^([0-9])/', '\\\\\\\\\1', $string);

  1090 	$string = preg_replace('/([a-z])/i', '\\\\\1', $string);

  1091 	return $string;

  1092 }

  1093 

  1094 /**

  1095  * Appends a trailing slash.

  1096  *

  1097  * Will remove trailing slash if it exists already before adding a trailing

  1098  * slash. This prevents double slashing a string or path.

  1099  *

  1100  * The primary use of this is for paths and thus should be used for paths. It is

  1101  * not restricted to paths and offers no specific path support.

  1102  *

  1103  * @since 1.2.0

  1104  * @uses untrailingslashit() Unslashes string if it was slashed already.

  1105  *

  1106  * @param string $string What to add the trailing slash to.

  1107  * @return string String with trailing slash added.

  1108  */

  1109 function trailingslashit($string) {

  1110 	return untrailingslashit($string) . '/';

  1111 }

  1112 

  1113 /**

  1114  * Removes trailing slash if it exists.

  1115  *

  1116  * The primary use of this is for paths and thus should be used for paths. It is

  1117  * not restricted to paths and offers no specific path support.

  1118  *

  1119  * @since 2.2.0

  1120  *

  1121  * @param string $string What to remove the trailing slash from.

  1122  * @return string String without the trailing slash.

  1123  */

  1124 function untrailingslashit($string) {

  1125 	return rtrim($string, '/');

  1126 }

  1127 

  1128 /**

  1129  * Adds slashes to escape strings.

  1130  *

  1131  * Slashes will first be removed if magic_quotes_gpc is set, see {@link

  1132  * http://www.php.net/magic_quotes} for more details.

  1133  *

  1134  * @since 0.71

  1135  *