获取ＵＲＬ中参数和值

$str = 'http://www.mfen.cn/?jd_id=11111&id=99999&sj=hsdbd';
$data = get($str);
echo $data['id'];//99999

//定义处理函数
function get($str){
    $data = array();
    $parameter = explode('&',end(explode('?',$str)));
    foreach($parameter as $val){
        $tmp = explode('=',$val);
        $data[$tmp[0]] = $tmp[1];
    }
    return $data;
}