Subversion-Projekte lars-tiefland.php_share

<?php

// $Header: /cvsroot/html2ps/xhtml.entities.inc.php,v 1.11 2006/12/24 14:42:44 Konstantin Exp $

function process_character_references(&$html) {

  // Process symbolic character references

  global $g_html_entities;

  foreach ($g_html_entities as $entity => $code) {

    $html = str_replace("&{$entity};","&#{$code};",$html);

    // Some ill-brained webmasters write HTML symbolic references without

    // terminating semicolor (especially at www.whitehouse.gov. The following

    // replacemenet is required to fix these damaged inteties, converting them

    // to the numerical character reference.

    //

    // We use [\s<] as entity name terminator to avoid breaking up longer entity

    // names by filtering in only space or HTML-tag terminated ones.

    //

    $html = preg_replace("/&{$entity}([\s<])/","&#{$code};\\1",$html);

  };

  // Process hecadecimal character references

  while (preg_match("/&#x([[:xdigit:]]{2,4});/i", $html, $matches)) {

    // We cannot use plain str_replace, because 'x' symbol can be in both cases;

    // str_ireplace have appeared in PHP 5 only, so we cannot use it due the

    // compatibility problems

    $html = preg_replace("/&#x".$matches[1].";/i","&#".hexdec($matches[1]).";",$html);

  };

}

function escape_amp($html) {

  // Escape all ampersants not followed by a # sharp sign

  // Note that symbolic references were replaced by numeric before this!

  $html = preg_replace("/&(?!#)/si","&\\1",$html);

  // Complete all numeric character references unterminated with ';'

  $html = preg_replace("/&#(\d+)(?![\d;])/si","&#\\1;",$html);

  // Escape all ampersants followed by # sharp and NON-DIGIT symbol

  // They we're not covered by above conversions and are not a

  // symbol reference.

  // Also, don't forget that we've used &! They should not be converted too...

  //

  $html = preg_replace("/&(?!#\d)/si","&\\1",$html);

  return $html;

};

function escape_lt($html) {

  // Why this loop is needed here?

  // The cause is that, for example, <<<a> sequence will not be replaced by

  // &lt;&lt<a>, as it should be. The regular expression matches TWO symbols

  // << (actually, first < symbold, and one following it, so, the second <

  // will not be matched when script attempt to find and replace next occurrence using 'g' regexp

  // modifier. So, we will need to check for such situations agint and, possibly, restart the

  // search and replace process.

  //

  while (preg_match("#<(\s*[^!/a-zA-Z])#",$html)) {

    $html = preg_replace("#<(\s*[^!/a-zA-Z])#si","&#60;\\1",$html);

  };

  while (preg_match("#(<[^>]*?)<#si",$html)) {

    $html = preg_replace("#(<[^>]*?)<#si","\\1&#60;",$html);

  };

  return $html;

};

function escape_gt($html) {

  $html = preg_replace("#([^\s\da-zA-Z'\"/=-])\s*>#si","\\1>",$html);

  while (preg_match("#(>[^<]*?)>#si",$html)) {

    $html = preg_replace("#(>[^<]*?)>#si","\\1&#62;",$html);

  };

  return $html;

};

?>