//code值，从前端获取$code = $_GET[‘code‘];//注册时获取$appid="xxxxxxxxxxxxx";$secret = "xxxxxxxxxxxxxxxxxxxxx";$get_code_url = ‘https://api.weixin.qq.com/sns/jscode2session?appid=‘.$appid.‘&secret=‘.$secret.‘&js_code=‘.$code.‘&grant_type=authorization_code‘;$ret=file_get_contents($get_code_url);$openid= json_decode($ret)->{‘openid‘};