Replacing url names with real links.....

[Anon]

I'm trying to process a string and replace url names that start with string:
www.
http://
WWW.
HTTP://

with links to sites with that url. For exaple:

This is a simple string www.phpbuilder.com is a great site...

this link should be raplaced with sth like this:

This is a simple string <a href="www.php.builder.com">www.phpbuilder.com</a> is a great site...

but how to get only link (they have different lenths etc)

CAN YOU HELP ME.....
below is a function I think I should use... but it needs modifications

function url($message)
{
$message = str_replace("http://XXXXXX.XXX", "<a href=\"XXXXXX.XXX\">XXXXXX.XXX</a>", $message);
$message = str_replace("www.XXXXXX.XXX", "<a href=\"XXXXXX.XXX\">XXXXXX.XXX</a>", $message);

return($message);
}

[cheald]

$message = eregi_replace("(http:\/\/[^ ])","<A HREF=\"\1\">\1</A>",$message);

$message = eregi_replace("(www.[^ ])","<A HREF=\"http:\/\/\1\">\1</A>",$message);

That should do it. I haven't tested this code, though, so there might be some errors.

[cheald]

Tested it - this works. Sorry.

<?
$message = "php builder at www.phpbuilder.com or http://phpbuilder.com is a great site";
$message = eregi_replace("(http:\/\/[^ ]) ","<A HREF=\"\1\">\1</A> ",$message);
$message = eregi_replace("(www.[^ ]) ","<A HREF=\"http://\1\">\1</A> ",$message);
echo $message;
?>