This directive turns on linkification, auto-linking http, ftp and https URLs. a tags with the href attribute must be allowed. This directive has been available since 2.0.1.

'); /** * Injector that converts http, https and ftp text URLs to actual links. */ class HTMLPurifier_Injector_Linkify extends HTMLPurifier_Injector { var $name = 'Linkify'; var $needed = array('a' => array('href')); function handleText(&$token) { if (!$this->allowsElement('a')) return; if (strpos($token->data, '://') === false) { // our really quick heuristic failed, abort // this may not work so well if we want to match things like // "google.com", but then again, most people don't return; } // there is/are URL(s). Let's split the string: // Note: this regex is extremely permissive $bits = preg_split('#((?:https?|ftp)://[^\s\'"<>()]+)#S', $token->data, -1, PREG_SPLIT_DELIM_CAPTURE); $token = array(); // $i = index // $c = count // $l = is link for ($i = 0, $c = count($bits), $l = false; $i < $c; $i++, $l = !$l) { if (!$l) { if ($bits[$i] === '') continue; $token[] = new HTMLPurifier_Token_Text($bits[$i]); } else { $token[] = new HTMLPurifier_Token_Start('a', array('href' => $bits[$i])); $token[] = new HTMLPurifier_Token_Text($bits[$i]); $token[] = new HTMLPurifier_Token_End('a'); } } } }