hi! to all coders.. how to blocked user that use "phproxy" username in my site.. someone register in my site and use phproxy as a username..

function banned_browser($banned_browser)
{
$var[1] = 'http://Anonymouse.org/';
$var[2] = 'http://';
$result = count($var);
for ($i=0;$i<$result;$i++)
{
$ausg = stristr($banned_browser, $var[$i]);
if(strlen($ausg)>0)
{
die("Unauthorised browser detected.<br/> Please use your main browser");
}
}
}
$banned_browser = $_SERVER['HTTP_USER_AGENT']; banned_browser($banned_browser);
/* I don't know everything hehe */

else if(strlen($uid)==phproxy)
{
echo "Please chose another username";
}
/* I don't know everything hehe */
[COLOR="Red"]$cmd [/COLOR]= str_replace("phproxy","NOT ALLOWED",[COLOR="Red"]$cmd[/COLOR]);
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