Help My BBCode Function

[code=php]<?php // if someone tries to access this file directly from a browser, block them

if (realpath(__FILE__) == realpath($_SERVER[‘DOCUMENT_ROOT’] . ‘/’ . $_SERVER[‘SCRIPT_NAME’]))
{

die(‘Access Denied’);

}

function BBCODE($input)
{

$pattern = array();

$pattern[0] = “/[[Bb]](.*)[/[Bb]]/”;
$pattern[1] = “/[[Ii]](.*)[/[Ii]]/”;
$pattern[2] = “/[url=(.*)](.*)[/url]/i”;

$replace = array();

$replace[0] = “<b>$1</b>”;
$replace[1] = “<i>$1</i>”;
$replace[2] = “<a href=”$1″ target=”_blank”>$1</a>”;

$input = preg_replace($pattern, $replace, $input);

return $input;

}

?>[/code]

Okay, so I’m using REGEX to format my BBCode. The bold and italic both come out fine, but when I try to use url, something weird happens. It formats it into a url, but for some reason, it does so by adding the url as an extension to your current url. Instead of posting the link to go to [url]www.something.com[/url], it posts it to go to [url]www.something.com/directory/www.something.com[/url].

What should I do to fix this?

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