php js 截取指定的字符串 获取当前的连接地址

1.php

function dealWithId() {

//淘宝的连接url：
    $url = "https://item.taobao.com/item.htm?spm=a1z10.1-c.w5003-13051644504.7.9UkGEJ&id=523811160821&scene=taobao_shop";