如何从PHP获取谷歌的用户信息？

Question

我从Android发送令牌并进行此操作：

$mToken = $this->_request['token'];
                $userinfo = 'https://www.googleapis.com/oauth2/v1/tokeninfo?id_token=' . $mToken;
                $json = file_get_contents($userinfo);
                $userInfoArray = json_decode($json,true);
                $googleEmail = $userInfoArray['email'];
                $tokenUserId = $userInfoArray['user_id'];
                $tokenAudience = $userInfoArray['audience'];
                $tokenIssuer = $userInfoArray['issuer'];

                if ( strcasecmp( $tokenAudience, $GOOGLE_FULL_CLIENT_ID ) != 0) {
                    error_log ( "ERROR:'" . $tokenAudience . "' did not match." );
                }

如何获取用户信息？