php访问出现、“\” ASCll=92 state=0

Warning: Unexpected character in input: '\' (ASCII=92) state=0 in C:\AppServ\www\AdminbaseController.class.php on line 5

//源码如下
namespace Common\Controller;

use Common\Controller\AppframeController;

class AdminbaseController extends AppframeController
{

    protected $_curlHost = '127.0.0.1:8090';
    private $_defaultHost = '127.0.0.1:8090';


    public function __construct()
    {
        hook('admin_begin');
        $admintpl_path = C("SP_ADMIN_TMPL_PATH") . C("SP_ADMIN_DEFAULT_THEME") . "/";
        C("TMPL_ACTION_SUCCESS", $admintpl_path . C("SP_ADMIN_TMPL_ACTION_SUCCESS"));
        C("TMPL_ACTION_ERROR", $admintpl_path . C("SP_ADMIN_TMPL_ACTION_ERROR"));
        parent::__construct();
        $time = time();
        $this->assign("js_debug", APP_DEBUG ? "?v=$time" : "");
    }

use \Common\Controller\AppframeController;