how is this beta addon idea?

[bumba000]

okay so I've changed to the following, but I don't understand why dropping a ' # ' or a ' % ' into one of the $_GETs still breaks stuff. Isn't zen checking for this?

if(isset($_GET)){
    $cleanJpManus =  array();
    foreach($_GET as $key => $value){
        if(preg_match('/^jparam_manu/i', $key)){
        $clean = preg_replace('/[^0-9_]/', '', $value);
            $cleanJpManus[] = $clean;
        }
        
    }
    if(sizeof($cleanJpManus) == 0){unset($cleanJpManus);}
}

if(isset($_GET['jpricelohi'])){
    $cleanJpLoHi = preg_replace('/[^0-9_]/', '', $_GET['jpricelohi']);
}