Comments on: How to Implement Ajax in WordPress Themes

By: carlos victor

carlos victor — Fri, 10 Feb 2012 08:00:40 +0000

Great tutorial, man! Like others said, I also search in many websites and could not understand how to use ajax in wordpress. Congratulations!
ps: I had the same problem of the user thinkdj. So, would be nice if you could fix in the tutorial the name of the function.

By: Veronica

Veronica — Thu, 09 Feb 2012 04:04:58 +0000

This was a great tutorial. I’ve read ebooks, tutorials, etc. on WP ajax and was about to give up when I stumbled on your tutorial. It was straight forward and I was able to finish my chained select boxes based on custom post type meta data with no problems. Thank you!

By: Janvier

Janvier — Tue, 31 Jan 2012 10:53:58 +0000

Great piece of code to start from. However, I noticed you have a lot of typos which leads to all kinds of errors. If you could look into that, it’s be fantastic! I got it working and I appreciate the efforts indeed

By: Janvier

Janvier — Tue, 31 Jan 2012 10:52:28 +0000

To use a different taxonomy, on the get_categories('child_of='.$_POST['main_catid'].'&hide_empty=0'); add taxonomy=YOURTAXONOMY where YOURTAXONOMY is the name of the taxonomy you want to use. All becomes get_categories('child_of='.$_POST['main_catid'].'&hide_empty=0&taxonomy=YOURTAXONOMY'); Likewise, change wp_dropdown_categories('show_count=0&selected=-1&hierarchical=1&depth=1&hide_empty=0&exclude=1&show_option_none=Main Categories&name=main_cat'); TO wp_dropdown_categories('show_count=0&selected=-1&hierarchical=1&depth=1&hide_empty=0&exclude=1&show_option_none=Main Categories&name=main_cat&taxonomy=YOURTAXONOMY');

By: thinkdj

thinkdj — Sat, 28 Jan 2012 14:49:31 +0000

On the last Code Snippet block, it should be

add_action(‘wp_ajax_my_special_action’, ‘implement_ajax’);
add_action(‘wp_ajax_nopriv_my_special_action’, ‘implement_ajax’);//for users that are not logged in.

and not wp_ajax_my_special_ajax_call. Took me a while to find out why it was returning 0 always.

By: Saul

Saul — Tue, 06 Dec 2011 20:55:10 +0000

I have the follow Error: ¿Could you help me please?
Fatal error: Call to undefined function add_action() in /httpdocs/site/wp-includes/functions.php on line 4569
I have installed the WordPress Version 3.2.1

My Code:
function implement_ajax() {
if(isset($_POST['estado_id']))
{
$pages= get_pages(‘title_li=&sort_column=menu_order&parent=’.$_POST['estado_id'].’&child_of=’.$_POST['estado_id'].’&hierarchical=0′);
foreach ($pages as $pagg) {
$option = ‘ID ) . ‘”>’;;
$option .= $pag->post_title;
$option .= ”;
}

echo ‘Scegli…’.$option;
die();
} // end if
}
add_action(‘wp_ajax_my_special_action’, ‘implement_ajax’);
add_action(‘wp_ajax_nopriv_my_special_action’, ‘implement_ajax’);

By: Beratz Gashi

Beratz Gashi — Tue, 06 Dec 2011 00:27:12 +0000

if somebody can post a video tutorial of this will help us more to beginners

By: Alvin

Alvin — Wed, 24 Aug 2011 11:22:24 +0000

Hi super tutorial biut how to implement this in an existing theme ?
I have found the following code in my theme , but what should be modified ?
I am a total noob in php :(
—————————————————————————————————————-
$select = wp_dropdown_categories( 'show_option_none=Select&show_count=0&orderby=name&echo=0&hide_empty=0' );
$select = preg_replace( '||i’, ”, $select );
echo $select;
?>

—————————————————————————————————————-

Hope someone can help me out here!

Gr. Alvin

By: Take

Take — Sat, 20 Aug 2011 11:22:20 +0000

How i can add this function in some other php file, not in admin-ajax.php, can i add in functiones.php inside my theme?

By: Muhammad Adnan

Muhammad Adnan — Thu, 04 Aug 2011 21:44:55 +0000

function my_special_ajax_call() {
if(isset($_POST['main_catid']))
{
global $wpdb;
$categories = get_categories(‘child_of=’.$_POST['main_catid'].’&show_count=1&hide_empty=0′);
if(count($categories) > 0){
foreach ($categories as $cati) {
$option .= ‘term_id.’”>’;
$option .= $cati->cat_name;
//$option .= ‘ (‘.$cati->category_count.’)';
$option .= ”;
}}else{

$option = ‘None’;

}

//
echo $option;
die();
} // end if
}
add_action(‘wp_ajax_my_special_ajax_call’, ‘my_special_ajax_call’);
add_action(‘wp_ajax_nopriv_my_special_ajax_call’, ‘my_special_ajax_call’);//for users that are not logged in.