How to implement WeChat login in php

php method to implement WeChat login: 1. Obtain code with user consent and authorization; 2. Exchange code for web page authorization access_token; 3. Obtain user information.

The operating environment of this article: windows10 system, php 7, thinkpad t480 computer.

It is not difficult to use PHP to log in to WeChat. It can be simply divided into three steps, as shown below:

Step one: The user agrees to authorize and obtain the code

//微信登录 public function wxlogin() { $appid = ""; $secret = ""; $str="http://***.***.com/getToken"; $redirect_uri=urlencode($str); //通过code获得 access_token + openid $url="https://open.weixin.qq.com/connect/oauth2/authorize?appid=".$appid."&redirect_uri=".$redirect_uri."&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect"; header("Location:" . $url); }

Step 2: Exchange webpage authorization access_token through code

public function getToken() { $code = $_GET["code"]; $appid = ""; $secret = ""; //通过code获得 access_token + openid $url="https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$appid ."&secret=" . $secret . "&code=" . $code . "&grant_type=authorization_code"; $jsonResult =$this->https_request($url); $resultArray = json_decode($jsonResult, true); $access_token = $resultArray["access_token"]; $openid = $resultArray["openid"]; //第三步 获取用户信息 //通过access_token + openid 获得用户所有信息,结果全部存储在$infoArray里,后面再写自己的代码逻辑 $infoUrl = "https://api.weixin.qq.com/sns/userinfo?access_token=" . $access_token . "&openid=" . $openid.'&lang=zh_CN'; $infoResult = $this->https_request($infoUrl); $infoArray = json_decode($infoResult, true); if($infoArray['unionid']) { } }

Additional: Methods used in the code

// An highlighted block function https_request($url, $data = null) { $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, $url); curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE); if (!empty($data)){ curl_setopt($curl, CURLOPT_POST, 1); curl_setopt($curl, CURLOPT_POSTFIELDS, $data); } curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); $output = curl_exec($curl); curl_close($curl); return $output; }

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