Add Custom ComboBox Filters to Admin User List in WordPress

2 comments

1. This is what i’m looking for:

   add_action('restrict_manage_posts', 'my_restrict_manage_posts');
   function my_restrict_manage_posts()
   {
     global $typenow;
   
     if ($typenow == 'your_custom_post_type') {
       $args = array(
         'show_option_all' => "Show All Categories",
         'taxonomy' => 'your_custom_taxonomy',
         'name' => 'your_custom_taxonomy'
   
       );
       wp_dropdown_categories($args);
     }
   }
   
   add_action('request', 'my_request');    
   function my_request($request)
   {
     if (is_admin() && $GLOBALS['PHP_SELF'] == '/wp-admin/edit.php' && isset($request['post_type']) && $request['post_type'] == 'your_custom_post_type') {
       $request['term'] = get_term($request['your_custom_taxonomy'], 'your_custom_taxonomy')->name;
     }
     return $request;
   }
   

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2. You can add your own fields to a user add/edit field.
   this example shows how to add a address input field, if you get this working try switching it with the dropdown’s that you need. If that’s what you mean by ‘combobox’

   function fb_add_custom_user_profile_fields( $user ) {
   ?>
       <h3><?php _e('Extra Profile Information', 'your_textdomain'); ?></h3>
       <table class="form-table">
       <tr>
       <th>
       <label for="address"><?php _e('Address', 'your_textdomain'); ?>
       </label></th>
       <td>
       <input type="text" name="address" id="address" value="<?php echo esc_attr( get_the_author_meta( 'address', $user->ID ) ); ?>" class="regular-text" /><br />
       <span class="description"><?php _e('Please enter your address.', 'your_textdomain'); ?></span>
       </td>
       </tr>
       </table>
       <?php }
       function fb_save_custom_user_profile_fields( $user_id ) {
       if ( !current_user_can( 'edit_user', $user_id ) )
       return FALSE;
       update_usermeta( $user_id, 'address', $_POST['address'] );
       }
       add_action( 'show_user_profile', 'fb_add_custom_user_profile_fields' );
       add_action( 'edit_user_profile', 'fb_add_custom_user_profile_fields' );
       add_action( 'personal_options_update', 'fb_save_custom_user_profile_fields' );
       add_action( 'edit_user_profile_update', 'fb_save_custom_user_profile_fields' );
   

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