I am loading new form fields from Ajax when I click on radio button in my custom widget. In Ajax callback handler, I need to use get_field_name and get_field_id widget class methods. get_field_name method is return in WP_Widget class. So I try to get the instant of that class. But I unable to do that. So please someone help me how to use it in external class.

   function wp_ajax_suport(){

    add_action('wp_ajax_my_func', 'my_func');
    add_action('wp_ajax_nopriv_my_func', 'my_func');
    add_action( 'init', 'wp_ajax_suport' );

    function my_func(){

    <input type="text" name="<?php $this->get_field_name('name'); ?>">
  • just register your ajax actions properly - using external files causes more issues than it would serve any use. Mar 24, 2014 at 6:35
  • @syslogic: i am using registering ajax in proper way. I unable to use the function get_field_name inside ajax handler. Check my code sample
    – Gowri
    Mar 24, 2014 at 6:38
  • you have to register both, frontend and backend hooks, when using wp-ajax on the frontent. seems unlogical - but that's the way it works. Mar 25, 2014 at 8:18
  • Syslog it not related to my question
    – Gowri
    Mar 25, 2014 at 8:43
  • @syslogic: what you mean by proper way!. I understood what you saying front/back end ajax register. I am already doing it. But my actual question is entirely different from here. I want to access $this->get_field_name function in ajax handler.
    – Gowri
    Mar 28, 2014 at 10:51

1 Answer 1


Why you want to use ajax for showing some fields on form in widget? Can't it be done using simple show hide using jquery. See below. Not tested , just to give insight.


<input type="radio" id="someradio" />
<div id="somediv" style="display:none;">
    <input type="text" name="<?php $this->get_field_name('name'); ?>">


<script type="application/javascript">
  • Thanks for helping. But I loading form fields throw ajax. because it calls api. I don't want to waste the api calles for every load of the page. So I am calling ajax and loading the new dynamic form fields depends on selecting the checkbox. So I want to know how to use the get_field_name out side or is there a way to store the widget without that name function.
    – Gowri
    Mar 24, 2014 at 7:58

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