微信扫描二维码登录网站代码示例

<?php
/**
 *  微信公众平台PHP-SDK
 *  Wechatauth为非官方微信登陆API
 *  用户通过扫描网页提供的二维码实现登陆信息获取
 *  主要实现如下功能:
 *  get_login_code() 获取登陆授权码, 通过授权码才能获取二维码
 *  get_code_image($code='') 将上面获取的授权码转换为图片二维码
 *  verify_code() 鉴定是否登陆成功,返回200为最终授权成功.
 *  get_login_cookie() 鉴定成功后调用此方法即可获取用户基本信息
 *  sendNews($account,$title,$summary,$content,$pic,$srcurl='') 向一个微信账户发送图文信息
 *  get_avatar($url) 获取用户头像图片数据
 *  @author dodge <dodgepudding@gmail.com>
 *  @link https://github.com/dodgepudding/wechat-php-sdk
 *  @version 1.1
 * 
 */
include "snoopy.class.php";
class Wechatauth
{
        private $cookie;
        private $_cookiename;
        private $_cookieexpired = 3600;
        private $_account = 'test';
        private $_datapath = './data/cookie_';
        private $debug;
        private $_logcallback;
        public $login_user; //当前登陆用户, 调用get_login_info后获取
       
        public function __construct($options)
        {
                $this->_account = isset($options['account'])?$options['account']:'';
                $this->_datapath = isset($options['datapath'])?$options['datapath']:$this->_datapath;
                $this->debug = isset($options['debug'])?$options['debug']:false;
                $this->_logcallback = isset($options['logcallback'])?$options['logcallback']:false;
                $this->_cookiename = $this->_datapath.$this->_account;
                $this->getCookie($this->_cookiename);
        }
        /**
         * 把cookie写入缓存
         * @param  string $filename 缓存文件名
         * @param  string $content  文件内容
         * @return bool
         */
        public function saveCookie($filename,$content){
                return file_put_contents($filename,$content);
        }

/**
         * 读取cookie缓存内容
         * @param  string $filename 缓存文件名
         * @return string cookie
         */
        public function getCookie($filename){
                if (file_exists($filename)) {
                        $mtime = filemtime($filename);
                        if ($mtime<time()-$this->_cookieexpired) return false;
                        $data = file_get_contents($filename);
                        if ($data) $this->cookie = $data;
                }
                return $this->cookie;
        }
       
        /*
         * 删除cookie
         */
        public function deleteCookie($filename) {
                $this->cookie = '';
                @unlink($filename);
                return true;
        }
       
        private function log($log){
                if ($this->debug && function_exists($this->_logcallback)) {
                        if (is_array($log)) $log = print_r($log,true);
                        return call_user_func($this->_logcallback,$log);
                }
        }
       
        /**
         * 获取登陆二维码对应的授权码
         */
        public function get_login_code(){
                if ($this->_logincode) return $this->_logincode;
                $t = time().strval(mt_rand(100,999));
                $codeurl = 'https://login.weixin.qq.com/jslogin?appid=wx782c26e4c19acffb&redirect_uri=https%3A%2F%2Fwx.qq.com%2Fcgi-bin%2Fmmwebwx-bin%2Fwebwxnewloginpage&fun=new&lang=zh_CN&_='.$t;
                $send_snoopy = new Snoopy;
                $send_snoopy->fetch($codeurl);
                $result = $send_snoopy->results;
                if ($result) {
                        preg_match("/window.QRLogin.uuid\s+=\s+\"([^\"]+)\"https://www.jb51.net/",$result,$matches);
                        if(count($matches)>1) {
                                $this->_logincode = $matches[1];
                                $_SESSION['login_step'] = 0;
                                return $this->_logincode;
                        }
                }
                return $result;
        }