qimall/backend/behaviors/BeforeSend.php

<?php

namespace backend\behaviors;

use Yii;
use yii\base\Behavior;

/**
 * Class BeforeSend
 * @package api\behaviors
 * @author qimall
 */
class BeforeSend extends Behavior
{
    /**
     * {@inheritdoc}
     */
    public function events()
    {
        return [
            'beforeSend' => 'beforeSend',
        ];
    }

    /**
     * 格式化返回
     *
     * @param $event
     * @throws \yii\base\InvalidConfigException
     */
    public function beforeSend($event)
    {
        $response = $event->sender;
        
    }
}