php產生短網址的實例碼

function SuoUrl($url=''){
    $urlcode =$this->shorturl($url);
}function shorturl($url){
    $url=crc32($url);    $result=sprintf("%u",$url);    $res = $this->code62($result);    return $res;
}function 
code62($result){
    $show='';    while($x>0){        $s=$x % 62;        if ($s>35){            $s=chr($s+61);
        }elseif($s>9&&$s<=35){            $s=chr($s+55);
        }        $show.=$s;        $x=floor($x/62);
    }    return $show;
}