微信开放平台 获取微信openid和unionid

<?php//官方文档 https://developers./doc/oplatform/Website_App/WeChat_Login/Wechat_Login.htmlnamespace Mobile\Controller;use Common\Model\MemberModel;use Think\Controller;class BaseController extends Controller {protected $UID = 0;protected $userInfo = [];public function _initialize(){header('Content-Type:text/html;charset=utf-8');//用户ID 用来判断用户是否登录$member_model = new MemberModel();$this->UID = intval($member_model->getAuthInfo('id'));//用户信息$userInfo = M('Member')->where(['id'=>$this->UID])->find();$this->userInfo = $userInfo;//获取微信openid 和 unionid$wx_info = session('wx_info');if(is_WeChat() && CONTROLLER_NAME != 'Login' && !$wx_info['openid']){session('wx_openid',null);$wx_openid = $this->get_openid();//根据access_token 和 openid 获取unionid$access_token = $this->get_access_token();$user_info_url = 'https://api./cgi-bin/user/info?access_token='.$access_token.'&openid='.$wx_openid;$wx_info = json_decode(curl_get($user_info_url),true);session('wx_info',$wx_info);//如果系统存在该微信账户 则使其登录$member_model->wx_login(['wx_unionId'=>$wx_info['unionid']]);}}/*** 获取微信用户openid*/public function get_openid(){$openid = null;$wx_openid = I('param.openid');if($wx_openid){session('wx_openid',$wx_openid);}$openid = session('wx_openid');if(empty($openid)){$openid = get_openid();}return $openid;}/*** 获取access_token 公众号的全局唯一接口调用凭据*/private function get_access_token(){$info = M('we_chat')->find();$access_token = $info['access_token'];$over_time = $info['over_time'];if(!$access_token || $over_time < time()){$url = 'https://api./cgi-bin/token?grant_type=client_credential&appid='.$info['app_id'].'&secret='.$info['app_secret'];$json = curl_get($url);$arr = json_decode($json,true);$access_token = $arr['access_token'];$data['id'] = $info['id'];$data['access_token'] = $arr['access_token'];$data['over_time'] = time() + 7100;//access_token的有效期目前为2个小时M('we_chat')->save($data);}return $access_token;}}

<?php/*** 是否为微信端*/function is_WeChat(){if (strpos($_SERVER['HTTP_USER_AGENT'],'MicroMessenger') !== false) {return true;}return false;}/*** 获取微信用户openid*/function get_openid() {if(!empty($_REQUEST['openid'])){$openid = $_REQUEST['openid'];session('wx_openid',$openid);return $openid;}else{$callback = C('ROOT_URL').'?m=mobile&c=Index&a=index';OAuthWX($callback);}}/*** 获取微信用户openid* @param string $callback*/function OAuthWX($callback){$wx_chat = M('we_chat')->where(['id'=>1])->find();$param['appid'] = $wx_chat['app_id'];if (!isset($_GET['getOpenId'])){$param['redirect_uri'] = $callback.'&getOpenId=1';$param['response_type'] = 'code';$param['scope'] = 'snsapi_base';//snsapi_base snsapi_userinfo$param['state'] = 'wx_login';$url = 'https://open./connect/oauth2/authorize?'.http_build_query($param).'#wechat_redirect';redirect($url);} elseif ($_GET['state']){$param['secret'] = $wx_chat['app_secret'];$param['code'] = I('code');$param['grant_type'] = 'authorization_code';$url = 'https://api./sns/oauth2/access_token?'.http_build_query($param);$content = curl_get($url);$content = json_decode($content,true);$openid = $content['openid'] ? $content['openid'] : -1;redirect($callback.'&openid='.$openid);}}/*** Curl GET 请求* @param string $url* @return string*/function curl_get($url) {$ch = curl_init();curl_setopt($ch,CURLOPT_URL,$url);curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);curl_setopt($ch,CURLOPT_HEADER,0);curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);//跳过ssl检查项$output = curl_exec($ch);if($output === FALSE ){echo "CURL Error:".curl_error($ch);}curl_close($ch);return $output;}