79 lines
2.9 KiB
PHP
Executable File
79 lines
2.9 KiB
PHP
Executable File
<?php
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// $Header: /cvsroot/html2ps/xhtml.entities.inc.php,v 1.11 2006/12/24 14:42:44 Konstantin Exp $
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function process_character_references(&$html) {
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// Process symbolic character references
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global $g_html_entities;
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foreach ($g_html_entities as $entity => $code) {
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$html = str_replace("&{$entity};","&#{$code};",$html);
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// Some ill-brained webmasters write HTML symbolic references without
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// terminating semicolor (especially at www.whitehouse.gov. The following
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// replacemenet is required to fix these damaged inteties, converting them
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// to the numerical character reference.
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//
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// We use [\s<] as entity name terminator to avoid breaking up longer entity
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// names by filtering in only space or HTML-tag terminated ones.
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//
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$html = preg_replace("/&{$entity}([\s<])/","&#{$code};\\1",$html);
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};
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// Process hecadecimal character references
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while (preg_match("/&#x([[:xdigit:]]{2,4});/i", $html, $matches)) {
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// We cannot use plain str_replace, because 'x' symbol can be in both cases;
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// str_ireplace have appeared in PHP 5 only, so we cannot use it due the
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// compatibility problems
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$html = preg_replace("/&#x".$matches[1].";/i","&#".hexdec($matches[1]).";",$html);
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};
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}
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function escape_amp($html) {
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// Escape all ampersants not followed by a # sharp sign
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// Note that symbolic references were replaced by numeric before this!
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$html = preg_replace("/&(?!#)/si","&\\1",$html);
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// Complete all numeric character references unterminated with ';'
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$html = preg_replace("/&#(\d+)(?![\d;])/si","&#\\1;",$html);
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// Escape all ampersants followed by # sharp and NON-DIGIT symbol
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// They we're not covered by above conversions and are not a
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// symbol reference.
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// Also, don't forget that we've used &! They should not be converted too...
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//
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$html = preg_replace("/&(?!#\d)/si","&\\1",$html);
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return $html;
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};
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function escape_lt($html) {
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// Why this loop is needed here?
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// The cause is that, for example, <<<a> sequence will not be replaced by
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// <<<a>, as it should be. The regular expression matches TWO symbols
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// << (actually, first < symbold, and one following it, so, the second <
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// will not be matched when script attempt to find and replace next occurrence using 'g' regexp
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// modifier. So, we will need to check for such situations agint and, possibly, restart the
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// search and replace process.
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//
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while (preg_match("#<(\s*[^!/a-zA-Z])#",$html)) {
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$html = preg_replace("#<(\s*[^!/a-zA-Z])#si","<\\1",$html);
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};
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while (preg_match("#(<[^>]*?)<#si",$html)) {
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$html = preg_replace("#(<[^>]*?)<#si","\\1<",$html);
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};
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return $html;
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};
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function escape_gt($html) {
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$html = preg_replace("#([^\s\da-zA-Z'\"/=-])\s*>#si","\\1>",$html);
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while (preg_match("#(>[^<]*?)>#si",$html)) {
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$html = preg_replace("#(>[^<]*?)>#si","\\1>",$html);
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};
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return $html;
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};
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?>
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