Title: Callback Example?
Last modified: August 21, 2016

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# Callback Example?

 *  [Brian DiChiara](https://wordpress.org/support/users/briandichiara/)
 * (@briandichiara)
 * [11 years, 10 months ago](https://wordpress.org/support/topic/callback-example/)
 * Can someone please share how the “callback” parameter works? Is it a PHP function
   callback, Javascript callback? I can’t seem to find a working example, and every
   test I’ve attempted doesn’t seem to fire. Here’s what my code looks like:
 * PHP including PHP callback
 *     ```
       add_filter( 'infinite_scroll_options', 'mytheme_infinite_scroll_options' );
   
       function mytheme_infinite_scroll_options( $options ){
       	$options['callback'] = 'mytheme_infinite_scroll_callback';
       	return $options;
       }
   
       function mytheme_infinite_scroll_callback( $vars = array() ){
       	echo '<script type="text/javascript">alert(\'php callback\');</script>';
       	return $vars;
       }
       ```
   
 * JS Version
 *     ```
       function mytheme_infinite_scroll_callback(){
       	alert('js callback');
       }
       ```
   
 * I don’t get either alert.
 * [https://wordpress.org/plugins/infinite-scroll/](https://wordpress.org/plugins/infinite-scroll/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [Dojo Digital](https://wordpress.org/support/users/dojodigital/)
 * (@dojodigital)
 * [11 years, 10 months ago](https://wordpress.org/support/topic/callback-example/#post-5158058)
 * It’s just javascript code that executes after each load. It doesn’t need to be
   wrapped in a function. Try this:
 * `alert('js callback');`
 *  Thread Starter [Brian DiChiara](https://wordpress.org/support/users/briandichiara/)
 * (@briandichiara)
 * [11 years, 10 months ago](https://wordpress.org/support/topic/callback-example/#post-5158059)
 * Great! Thanks, just what I was looking for! I appreciate the help!

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Callback Example?’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/infinite-scroll.svg)
 * [Infinite-Scroll](https://wordpress.org/plugins/infinite-scroll/)
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## Tags

 * [callback](https://wordpress.org/support/topic-tag/callback/)

 * 2 replies
 * 2 participants
 * Last reply from: [Brian DiChiara](https://wordpress.org/support/users/briandichiara/)
 * Last activity: [11 years, 10 months ago](https://wordpress.org/support/topic/callback-example/#post-5158059)
 * Status: not resolved