Ajax : Why success displays 0?

Question

I use ajax with jquery and when I tried to display the result in popup. Then alert always displays 0

success : function(results) { 
alert(result         


        

Answer 1

I was adding the "action" incorrectly. You have to prefix your action with wp_ajax_gd_.

add_action('wp_ajax_gd_[ACTION NAME]', '[CALLBACK FUNCTION NAME]')

and in the JS jQuery post:

var data = {
    'action': '[ACTION NAME]',
};

I found Wordpress' documentation very unclear about this part.