//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');

}

}

}