calling php function from javascript or AJAX

Yii 1.1 General Discussion
1

Hi folks,

I have a problem, I need to call a php function from javascript function periodically. It needs to be called once a users logs in, and maybe every 5 to 10 seconds after that. Can anyone give me, or point me to a very simple example of this being done?

Help is greatly appreciated

2

I would say you need to use Ajax. Something like CHtml::ajax();

http://www.yiiframework.com/doc/api/1.1/CHtml/#ajax-detail

http://api.jquery.com/jQuery.ajax/

You can see some examples of Ajax being used here:

http://www.yiiframework.com/wiki/49/update-content-in-ajax-with-partialrender

I assume you would not need to do anything with the returned content, so your controller action could just return "TRUE" or something.

3

Thanks NaX, well what I need is when a user logs in is to check the db for something. If this is true it should show some buttons, if false, they shouldn’t be visible. At the moment I just have some logic in the view, which should be avoided I know, which checks a condition, if it’s true it displays some buttons, if not they are not displayed. Its not a function though, if I put that code in a function I guess I could call it with ajax. Does that make any sense?

4

It sounds like the check should be part of the user, why not make it part of the user object.

How to add more information to Yii::app()->user

http://www.yiiframework.com/wiki/6/how-to-add-more-information-to-yii-app-user/

Add information to Yii::app()->user by extending CWebUser

http://www.yiiframework.com/wiki/60/

Something like:




<?php


class WebUser extends CWebUser {

	public function getSpecialCheck() {

		if (!$this->getIsGuest() && 'something' == 'something') {

			return TRUE;

		}

		else {

			return FALSE;

		}

	}

}

?>

Then in your view something like


<?php if (Yii::app()->user->specialCheck): ?>

	hello world

<?php else: ?>

	good by world

<?php endif; ?>

If you still need to do this check using ajax you can setup a controller action that calls this function then call that action using Ajax.

I hope that helps.

FYI, I would avoid making Ajax calls every 5-10 seconds that will slow down your site a lot. If you can get away with doing it without Ajax/JavaScript that would be the best solution for me.