ZZCS/coding/st-xm/Api/getOpenId.php

<?php
require_once '../Common/Mysql.php';
$openid=isset($_COOKIE['user_openid'])?$_COOKIE['user_openid']:'';
$code=isset($_GET['code'])?$_GET['code']:'';
if ($openid==''){
	if ($code ==''){
		$selfUrl=urlencode("http://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']);
		$getCodeUrl="https://open.weixin.qq.com/connect/oauth2/authorize?appid=".APPID."&redirect_uri=".$selfUrl."&response_type=code&scope=snsapi_base&state=STATE#wechat_redirect";
		Header("Location: $getCodeUrl");
		exit();
	}else{
		$getOpenidUrl="https://api.weixin.qq.com/sns/oauth2/access_token?appid=".APPID."&secret=".APPSECRET."&code=".$code."&grant_type=authorization_code";
		$response=httpRequest($getOpenidUrl);
		$openIdObj=json_decode($response);
		$openid=$openIdObj->openid;
		setcookie('user_openid', $openid, 0, '/');
	}
}
echo $openid;
?>