1、首先到微信开放平台申请https://open.weixin.qq.com/ 获取到appid和APPSECRET，前台显示页面如下:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</head>
<body>
<span id="login_container"></span>
<script src="http://res.wx.qq.com/connect/zh_CN/htmledition/js/wxLogin.js"></script>
<script>
var obj = new WxLogin({
id: "login_container",
appid: "110",
scope: "snsapi_login",
redirect_uri: encodeURIComponent("http://" + window.location.host + "/login.php"),
state: Math.ceil(Math.random()*1000),
style: "black",
href: ""});
</script>
</body>
</html>
2、登录页面代码如下：
<?php
header("Content-type: text/html; charset=utf-8");
require_once('wxopen.class.php');
$weixin = new class_weixin();
if (!isset($_GET["code"])){
$redirect_url = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
$jumpurl = $weixin->qrconnect($redirect_url, "snsapi_login", "123");
Header("Location: $jumpurl");
}else{
$oauth2_info = $weixin->oauth2_access_token($_GET["code"]);
$userinfo = $weixin->oauth2_get_user_info($oauth2_info['access_token'], $oauth2_info['openid']);
var_dump($userinfo);
}
3、登录页面中引用的wxopen.class.php代码如下：
<?php
/*
开发者 https://dev.21ds.cn/
CopyRight 2017 All Rights Reserved
微信开放平台接口SDK
*/
/*
require_once('weixin.class.php');
$weixin = new class_weixin();
*/
define('APPID', "110"); //填写开放平台申请的APPID
define('APPSECRET', "110"); //填写对应的APPSECRET
class class_weixin
{
var $appid = APPID;
var $appsecret = APPSECRET;
//构造函数，获取Access Token
public function __construct($appid = NULL, $appsecret = NULL)
{
if($appid && $appsecret){
$this->appid = $appid;
$this->appsecret = $appsecret;
}
//扫码登录不需要该Access Token, 语义理解需要
//1. 本地写入
$res = file_get_contents('access_token.json');
$result = json_decode($res, true);
$this->expires_time = $result["expires_time"];
$this->access_token = $result["access_token"];
if (time() > ($this->expires_time + 3600)){
$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->appid."&secret=".$this->appsecret;
$res = $this->http_request($url);
$result = json_decode($res, true);
$this->access_token = $result["access_token"];
$this->expires_time = time();
file_put_contents('access_token.json', '{"access_token": "'.$this->access_token.'", "expires_time": '.$this->expires_time.'}');
}
}
//生成扫码登录的URL
public function qrconnect($redirect_url, $scope, $state = NULL)
{
$url = "https://open.weixin.qq.com/connect/qrconnect?appid=".$this->appid."&redirect_uri=".urlencode($redirect_url)."&response_type=code&scope=".$scope."&state=".$state."#wechat_redirect";
return $url;
}
//生成OAuth2的Access Token
public function oauth2_access_token($code)
{
$url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$this->appid."&secret=".$this->appsecret."&code=".$code."&grant_type=authorization_code";
$res = $this->http_request($url);
return json_decode($res, true);
}
//获取用户基本信息（OAuth2 授权的 Access Token 获取 未关注用户，Access Token为临时获取）
public function oauth2_get_user_info($access_token, $openid)
{
$url = "https://api.weixin.qq.com/sns/userinfo?access_token=".$access_token."&openid=".$openid."&lang=zh_CN";
$res = $this->http_request($url);
return json_decode($res, true);
}
public function semantic_search($record)
{
$data = urldecode(json_encode($record));
$url = "https://api.weixin.qq.com/semantic/semproxy/search?access_token=".$this->access_token;
$res = $this->http_request($url, $data);
return json_decode($res, true);
}
//HTTP请求（支持HTTP/HTTPS，支持GET/POST）
protected function http_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, TRUE);
$output = curl_exec($curl);
curl_close($curl);
return $output;
}
//日志记录
private function logger($log_content)
{
if(isset($_SERVER['HTTP_APPNAME'])){ //SAE
sae_set_display_errors(false);
sae_debug($log_content);
sae_set_display_errors(true);
}else if($_SERVER['REMOTE_ADDR'] != "127.0.0.1"){ //LOCAL
$max_size = 500000;
$log_filename = "log.xml";
if(file_exists($log_filename) and (abs(filesize($log_filename)) > $max_size)){unlink($log_filename);}
file_put_contents($log_filename, date('Y-m-d H:i:s').$log_content."\r\n", FILE_APPEND);
}
}
}
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