How to execute code after returning view in Yii2

Yii 2.0 General Discussions
1

Normally when you call a page in Yii2, pretty much the last thing that happens is that the view is rendered to the end user’s screen. I need to run code after this that might take a second or two and I don’t want to have the user wait.

My first thought was to set a global event that gets called after the response is set so I added this to a method:

if (condition is met) {
    Yii::$app->on(yii\web\Response::EVENT_AFTER_SEND, function ($event) {
        // do stuff
    });
}

But this doesn’t seem to ever get called. Does anyone know what I’m doing wrong or have a better idea on how to solve this problem? I just need to run code after the view is rendered. I don’t really care how it happens.

2

After view is rendered to the user you can only run JavaScript.
If you use JQuery then do something like this in the view you are rendering

$script = <<< JS
$('document').ready(function(){
    //Your JavaScript Code here when page is loaded
});
JS;

$this->registerJs($script, \yii\web\View::POS_END);

for communicating to Yii backend, use AJAX

3

Thanks but unfortunately it needs to be without javascript/JQuery/AJAX. Server-side only.

4

Impossible to do when the page have rendered!
Check if After action event is useful for your case!

5

I just tried this.
Can be done by config

		'response' => [
			'class' => 'yii\web\Response',
			'on afterSend' => function ($event) {
				Yii::debug('after send');
			},
		],
1 Like
6

If you need to call method after rendering the view, you may also use View::EVENT_END_PAGE.