Plugin PHP help

Ok, so I've been playing around with tearing a few modifications apart and trying to make it to where you have to have a minimum number of posts to post links in signatures. But, I'm a little stuck lol. This is what I have in my plugin so far. Hook location: profile_updatesignature_start

PHP:

global $vbulletin, $foruminfo;
$pagetext =& $this->fetch_field('pagetext', 'post');
$excludedugs = explode(",", $vbulletin->options['usml_siglink_exug']);
        if (!is_member_of($vbulletin->userinfo, $excludedugs))
        {
        if ($vbulletin->options['usml_siglink_enable'] && $vbulletin->userinfo['posts'] < $vbulletin->options['usml_siglink_minposts'])
        {
        if (stristr($pagetext,'http://') || stristr($pagetext,'www.') || stristr($pagetext,'@') || stristr($pagetext,'[URL') || stristr($pagetext,'[url') || stristr($pagetext,'.com') || stristr($pagetext,'.org') || stristr($pagetext,'.net') || stristr($pagetext,'.gov') || stristr($pagetext,'.biz') || stristr($pagetext,'.info') || stristr($pagetext,'.tv'))
        {
        standard_error(fetch_error('usml_siglink_msg', $vbulletin->userinfo['username'], vbulletin->options['usml_siglink_minposts'], $vbulletin->userinfo['posts']));
        }
        }
        }

Apparently what I have doesn't work as I can still post links in my signature. So a variable must be wrong and/or some additional code is needed, which I'm not sure what it is, or if the above is even correct to start with. So any guidance you can give me will be greatly appreciated

Thank you

 

This has been solved. Thanks everyone!

 

what was the fix?

 

PHP:

$excludedugs = explode(',', $vbulletin->options['usml_siglink_exug']);

    if (!is_member_of($vbulletin->userinfo, $excludedugs))
    {
        if ($vbulletin->options['usml_siglink_enable'] AND $vbulletin->userinfo['posts'] < $vbulletin->options['usml_siglink_minposts'])
        {
            if (stristr($signature, 'http://') OR stristr($signature, 'www.') OR stristr($signature, '[URL') OR preg_match("#[a-z0-9]([-a-z0-9]+)?(\.[a-z]{2,3})?(\.[a-z]{2,4})#i", $signature))
            {
                $errors[] = fetch_error('usml_siglink_msg', $vbulletin->userinfo['username'], $vbulletin->options['usml_siglink_minposts'], $vbulletin->userinfo['posts']);
            }
        }
    }

As many different combinations that I went through and was still going through, I was ALMOST there lol