urlencode full url given at input

urlencode

 function urlencodeFull($string)
    {
        $ar=explode('://',$string);
        foreach ($ar as $key=>$item)
        {
            $last=explode("/",$item);

            foreach ($last as $subkey=>$subitem)
            {
                $last[$subkey]=rawurlencode($subitem);
            }
            $ar[$key]=implode("/",$last);
        }
        return implode("://",$ar);
    }