$replacement = array ('&' => '&',
                         '<' => '&lt;',
                         '>' => '&gt;',
                         '"' => '&quot;');

   /*
    * Given a $matches from a successful match in which $matches[0] is the text character in need of
    * conversion to HTML, return the appropriate HTML string. Because this function is used under only
    * carefully controlled conditions, we feel safe blindly using the arguments.
    */
   function text2html_callback($matches)
   {

       global $replacement;
       return $replacement[$matches[0]];

   }

   $new_subject = preg_replace_callback('/[&<">]/S',           /* pattern */
                                        "text2html_callback",/* callback */
                                        $subject);




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Copyright 1997-2024 Jeffrey Friedl