如何通过PHP实现微信登录功能？

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plaintextphp微信登录.txt: 调用get_state()函数；获取URL；设置URL为微信登录地址；

php微信登录.txt

get_state(); $url = 'open.weixin.qq.com/connect/qrconnect?appid='.$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 $token_url = 'api.weixin.qq.com/sns/oauth2/access_token?appid='.$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() { $url = 'api.weixin.qq.com/sns/userinfo?access_token='.$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'); } } }