PHP 网页授权获取微信用户基本信息（微信登录）

           
        $appid = "appid "; //微信公众号（必须服务号）->基本配置 ->公众号开发信息 获取appid 和AppSecret

		$secret = "secret ";
		
		if(!cookie('code')||!cookie('mid')){
			
			
			$redirect_uri = urlencode('http://'.$_SERVER['SERVER_NAME'].''); //微信公众号绑定域名 （公众号设置->功能设置->网页授权域名）
			$url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=$appid&redirect_uri=$redirect_uri&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect";
			header("Location:" . $url);

		}
		
		if(I('code') && !cookie('mid')){
			
			$code = $_GET["code"];
			cookie('code',$code);
			$oauth2Url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=$appid&secret=$secret&code=$code&grant_type=authorization_code";
			$oauth2 = getJson($oauth2Url);

			//access_token和openid
			$access_token = $oauth2["access_token"];
			$openid = $oauth2['openid'];
			$get_user_info_url = "https://api.weixin.qq.com/sns/userinfo?access_token=$access_token&openid=$openid&lang=zh_CN";
			$userinfo = getJson($get_user_info_url); //用户信息
			
			$user = M('Member')->where(array('openid'=>$userinfo['openid']))->find();
			if($user){
				cookie('mid',$user['id']);
			}else{
				$add['openid'] = $userinfo['openid'];
				$add['name'] = $userinfo['nickname'];
				$add['thumb'] = $userinfo['headimgurl'];
				$add['addtime'] = time();
				$add['sex'] = $userinfo['sex']==1?'男':'女';
				$add['city'] = $userinfo['province'].' '.$userinfo['city'];
				$add_user = M('Member')->add($add);
				if($add_user){
					cookie('mid',$add_user);
				}else{
					echo '登录失败';exit;
				}
			}

	 public function getJson($url){

        $ch = curl_init();

        curl_setopt($ch, CURLOPT_URL, $url);

        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

        $output = curl_exec($ch);

        curl_close($ch);

        return json_decode($output, true);

    }