[0] ThrowableError in Api.php line 33

致命错误: Call to undefined function plugins\weixin\index\simplexml_load_string()

* 对接微信公众号的唯一入口     * @return string|\plugins\weixin\index\unknown     */    public function index(){                if(input('echostr')){	//首次绑定接口地址时，微信要用到的测试接口是否正常            echo input('echostr');            exit;        }        //微信POST过来的非PHP标准数据        $responseObj = simplexml_load_string(file_get_contents("php://input"), 'SimpleXMLElement', LIBXML_NOCDATA);        //$responseObj = simplexml_load_string($HTTP_RAW_POST_DATA, 'SimpleXMLElement', LIBXML_NOCDATA);        //用户点击菜单事件        if($responseObj->Event=='CLICK'){            $responseObj->Content = $responseObj->EventKey;        }        self::$xml_obj = $responseObj;                //用户关注，取消关注，扫码，公众号开启的强制获取位置

Call Stack

1. in Api.php line 33

2. at Api->index() in common.php line 368

3. at plugin_action('weixin', 'api', 'index', []) in Plugin.php line 37

4. at Plugin->execute()

5. at ReflectionMethod->invokeArgs(object(Plugin), []) in App.php line 348

6. at App::invokeMethod([object(Plugin), 'execute'], []) in App.php line 612

7. at App::module(['index', 'plugin', 'execute'], ['app_host' => '', 'app_debug' => true, 'app_trace' => false, ...], false) in App.php line 461

8. at App::exec(['type' => 'module', 'module' => ['index', 'plugin', 'execute'], 'convert' => false], ['app_host' => '', 'app_debug' => true, 'app_trace' => false, ...]) in App.php line 139

9. at App::run() in start.php line 19

10. at require('/home/tanglihe/wwwro...') in index.php line 29