Title: How to Populate Select from PHP Function in WordPress
Last modified: August 22, 2016

---

# How to Populate Select from PHP Function in WordPress

 *  [Harris Marfel](https://wordpress.org/support/users/hrace009/)
 * (@hrace009)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/how-to-populate-select-from-php-function-in-wordpress/)
 * I have a form shown below:
 *     ```
       <?php
       $list_id = $db_connect->get_results($db_connect->prepare('SELECT * FROM users WHERE wp_ID= %d AND svr_region=%d', $wpid, 1));
       ?>
       <form name = "reset_data" action="<?php the_permalink(); ?>" method="post">
           <select id = "select_id" name="select_id" required>
               <option value="" > - Chose ID - </option>
               <?php
               foreach ($list_id as $list_id) {
                   $get_list_id = $list_id->ID;
                   $get_list_name = $list_id->name;
                   echo '<option value="' . $get_list_id . '" >[' . $get_list_id . '] ' . $get_list_name . '</option>';
               }
               ?>
           </select>
           <select id = "select_role" name="select_role" >
               <option value="" > - Chose Role - </option>
               <?php
               $get_role = GetRoleList($_POST['select_id']);
               echo $get_role;
               ?>
           </select>
           <input type="submit" value="Get Data! »"/>
       </form>
       ```
   
 * How do I create a JQuery or Ajax to disable `#select_role` if `#select_id` has
   an empty value.
 * `#select_id` value type is Integer, and after `#select_id` chosen, it will execute
   a PHP function `GetRoleList ( $_POST['select_id'] )` and returns the result like
   this `'<option value="' . $nick_str . '" >' .$nick_str. '</option>'`

Viewing 1 replies (of 1 total)

 *  Moderator [bcworkz](https://wordpress.org/support/users/bcworkz/)
 * (@bcworkz)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/how-to-populate-select-from-php-function-in-wordpress/#post-5634095)
 * By default you should probably have `#select_role` disabled, and enable it when
   a `#select_id` is selected. Just saying, it’ll work either way.
 * You will want a jQuery function to execute with the onchange event of `#select_id`.
   This will make the AJAX call to get the proper `#select_role` content from the
   server and place it in the `#select_role` element. Upon successful response from
   the server, `#select_role` is enabled.
 * AJAX in WP is rather involved and unique, so it is good that you asked, but it
   is too much to get into here. The following is a good reference to get you started:
   
   [https://developer.wordpress.org/plugins/javascript/ajax/](https://developer.wordpress.org/plugins/javascript/ajax/)
 * I would suggest you start with a very basic test scenario to establish you basic
   AJAX code. Once all the bugs are ironed out, you can then progress to doing something
   useful like populating `#select_role`.

Viewing 1 replies (of 1 total)

The topic ‘How to Populate Select from PHP Function in WordPress’ is closed to new
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## Tags

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

 * In: [Hacks](https://wordpress.org/support/forum/plugins-and-hacks/hacks/)
 * 1 reply
 * 2 participants
 * Last reply from: [bcworkz](https://wordpress.org/support/users/bcworkz/)
 * Last activity: [11 years, 5 months ago](https://wordpress.org/support/topic/how-to-populate-select-from-php-function-in-wordpress/#post-5634095)
 * Status: not resolved

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