php file_put_contents占用的文件比脚本执行的时间长

Question

如果我不使用睡眠（3）。页面刷新并获取旧文件。或者我在js中使用计时器然后重新加载它的帮助。但我认为这是错误的方式。我不明白file_put_contents最终完成后如何返回$ ajax成功。

class OrderparamController extends FrontEndController 
{
      public function actionIndex($typeproduct = OrderService::TypePrintBannerCloth) {
        $forms = $this->requireFile('order-forms.php');
        $tplParams=array(
            'id_order' => $typeproduct,
            'forms' => $forms
        );
        $this->render('form',$tplParams);
    }

    /**
     * Require file
     */
    protected function requireFile($file_name){
        $configFile = YiiBase::getPathOfAlias('application.cache').'/'.$file_name;
        $handle = fopen($configFile, "r");
        fclose($handle);
        require $configFile;
        return $forms; 
    }
/*
     * Удалить параметр
     */
    public function actionDeleteparamoption() {
        $configFile='order-forms.php';
        $forms=$this->requireFile($configFile);
        $keyfield = $_POST['keyfield'];
        $id_order = (int)$_POST['id_order'];
        $numoption = $_POST['numoption'];
        unset($forms[$id_order]['fields'][$keyfield]['options'][$numoption]);
        if ($this->writeFile($forms,$configFile)) {
            $answer=array(
                'ok' => true,
            );
        } else {
            $answer=array(
                'ok' => false,
            );
        }
        **sleep(3);**
        echo json_encode($answer);
    }
}

我使用js发送ajax

 $('.js-btn-delete').on('click',function(){
            var request ={
                keyfield : $(this).data('keyfield'),
                id_order : Var.id_order,
                label : $(this).data('label'),
                numoption : $(this).data('option'),
            }
            $.ajax({
                url: '/orderparam/deleteparamoption',
                type: 'POST',
                data: request,
                dataType: 'json',
                async: true,
                success: deleteOrderParamResult
            })
        });
        function deleteOrderParamResult(data){
            if (data.ok) {
                var num=intVal($('.param-option').index($('.param-option:visible')));
                document.cookie = "viewOption="+num;
                location.reload();
            } else {
                alert('ошибка');
            }
        }