vB 4.x ipProArcade Varning Sorunu - vB 4.1.10

Warning: stristr() [function.stristr]: needle is not a string or an integer in /path/to/forums/arcade.php on line 5550

function recursive_str_ireplace($replacethis,$withthis,$inthis){
    while (1==1)
    {
        $inthis = str_ireplace($replacethis,$withthis,$inthis);
        if(stristr($inthis, $replacethis) === FALSE)
        {
            RETURN $inthis;
        }
    }
    RETURN $inthis;
}

function recursive_str_ireplace($replacethis,$withthis,$inthis){ 
$old_inthis = "";
while ($old_inthis != $inthis)
{
$old_inthis = $inthis;
$inthis = str_ireplace($replacethis,$withthis,$inthis);
}
return $inthis;
}