/**
* 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);
}
