URLify regex (PHP)

A pal asked me to come up with a regex that will wrap URLs
in an anchor

tag while in a string:

Here's what I came up with:

<?php

$string  = "www.GOOGLE.com/~dude/index.html#fred
this is a test
(www.mang.net/test.php:443?php.totally.roxorz=1&%20+%20)

line
with http://yahoo.net and
maybe one of these http://www.fark.com, note
the comma at the end of www.example.com.";

$any     = "/#~:.?+=&%!\-.:?";
$regex   =
"((http://(www\.)?|www\.)[A-Za-z0-9\.\/\?\=\%\
+\:\&\#\~]+)";


print "$string\n\n";
print preg_replace("#$regex#i", "<a
href='$1'>$1</a>", $string);

?>

I'd love to see other ways to do this.  I am an old Perl
guy so I know
Tim Towtdi. 

-Ken 
http://lastinglinks.com


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There is a Perl sample in the second chapter of Mastering
Regular
Expressions, Second Edition by Jeffrey Friedl if that helps
at all.


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