网站微信登录

<?php
//处理并返回微信用户信息类
class wx{
//配置APP参数
private $appid         = '';
private $secret        = '';
private $re_url        = '';
private $state         = 'state';
private $access_token  = '';
private $openid        = '';

public function __construct()
{
}

public function get_code()
{
$this->get_state();
$url = 'https://open.weixin.qq.com/connect/qrconnect?appid='.$this->appid.'&redirect_uri='.urlencode($this->re_url).'&response_type=code&scope=snsapi_login&state='.$_SESSION[$this->state].'#wechat_redirect';
header('Location: '.$url);
}

public function get_info($code,$state){
$this->get_access_token($code,$state);
$userinfo = $this->get_user_info();
return  $userinfo;
}

/**
* [get_access_token 获取access_token]
* @param [string] $code [登陆后返回的$_GET['code']]
* @return [array] [expires_in 为有效时间 , access_token 为授权码 ; 失败返回 error , error_description ]
*/
public function get_access_token($code,$state)
{

//$this->is_state($state);
//获取access_token
$token_url           = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$this->appid.'&secret='.$this->secret.'&code='.$code.'&grant_type=authorization_code';
$result              = json_decode($this->_curl_get_content($token_url),true);
$this->access_token  = $result['access_token'];
$this->openid        = $result['openid'];
}
/**
* [get_user_info 获取用户信息]
* @param [string] $token [授权码]
* @param [string] $openid [用户唯一ID]
* @return [array] [ret：返回码，为0时成功。msg为错误信息,正确返回时为空。...params]
*/
public function get_user_info()
{

$url              = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$this->access_token.'&openid='.$this->openid;
$info             = json_decode($this->_curl_get_content($url), TRUE);
$info1['name']    = $info['nickname'];
$info1['sex']     = $info['sex'];
$info1['img']     = $info['headimgurl'];
$info1['openid']  = $info['openid'];
$info1['unid']    = $info['unionid'];

return $info1;
}

private function _curl_get_content($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, $url);
//设置超时时间为3s
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 3);
$result = curl_exec($ch);
curl_close($ch);
return $result;
}

//生成随机参数
private function get_state() {
$str               = str_shuffle('qazxswedcvfrtgbnhyujmkiol123456789') . time();
$_SESSION['state'] = md5(md5($str));
}

//判断随机数
private function is_state($state) {
if($state!==$_SESSION[$this->state]){
exit('随机数检验失败，疑似csrf攻击');
}
}
}