/** * Rewritten by Nathan Codding - Feb 6, 2001. * - Goes through the given string, and replaces xxxx://yyyy with an HTML <a> tag linking * to that URL * - Goes through the given string, and replaces www.xxxx.yyyy[zzzz] with an HTML <a> tag linking * to http://www.xxxx.yyyy[/zzzz] * - Goes through the given string, and replaces xxxx@yyyy with an HTML mailto: tag linking * to that email address * - Only matches these 2 patterns either after a space, or at the beginning of a line * * Notes: the email one might get annoying - it's easy to make it more restrictive, though.. maybe * have it require something like xxxx@yyyy.zzzz or such. We'll see. */function make_clickable($text){ $text = preg_replace('#(script|about|applet|activex|chrome):#is', "\\1:", $text); // pad it with a space so we can match things at the start of the 1st line. $ret = ' ' . $text; // matches an "xxxx://yyyy" URL at the start of a line, or after a space. // xxxx can only be alpha characters. // yyyy is anything up to the first space, newline, comma, double quote or < $ret = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a href=\"\\2\" target=\"_blank\">\\2</a>", $ret); // matches a "www|ftp.xxxx.yyyy[/zzzz]" kinda lazy URL thing // Must contain at least 2 dots. xxxx contains either alphanum, or "-" // zzzz is optional.. will contain everything up to the first space, newline, // comma, double quote or <. $ret = preg_replace("#(^|[\n ])((www|ftp)\.[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a href=\"http://\\2\" target=\"_blank\">\\2</a>", $ret); // matches an email@domain type address at the start of a line, or after a space. // Note: Only the followed chars are valid; alphanums, "-", "_" and or ".". $ret = preg_replace("#(^|[\n ])([a-z0-9&\-_.]+?)@([\w\-]+\.([\w\-\.]+\.)*[\w]+)#i", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>", $ret); // Remove our padding.. $ret = substr($ret, 1); return($ret);}