[wp-trac] [WordPress Trac] #41882: Walker_CategoryDropdown does not wrap options inside HTML select element with wp_list_categories

[WordPress Trac]

#41882: Walker_CategoryDropdown does not wrap options inside HTML select element
with wp_list_categories
------------------------------+-----------------------------
 Reporter:  subrataemfluence  |      Owner:
     Type:  defect (bug)      |     Status:  new
 Priority:  normal            |  Milestone:  Awaiting Review
Component:  Taxonomy          |    Version:  4.8.1
 Severity:  normal            |   Keywords:
  Focuses:                    |
------------------------------+-----------------------------
 If I use `Walker_CategoryDropdown()` class to build a dropdown list with
 `wp_list_categories` function, the output does not get wrapped inside
 `<select>...</select>` element. The rendered output is like this:


 {{{
 <option class="level-0" value="16">Comedy</option>
 <option class="level-0" value="17">Sci-Fi</option>
 }}}


 when it should be like


 {{{
 <select>
    <option class="level-0" value="16">Comedy</option>
    <option class="level-0" value="17">Sci-Fi</option>
 </select>
 }}}

 In order to achieve this we can add an additional parameter
 `html_wrapper_element` in `wp_list_categories` function and pass a value
 `dorpdown` in the argument like:

 {{{#!php
 <?php
 <?php
 /* Template Name: Movie List */
 require_once ABSPATH . 'wp-admin/includes/template.php';
 $args = array(
     'taxonomy' => 'movies_taxonomy',
     'walker' => new Walker_CategoryDropdown(),
     'hide_empty' => false,
     'html_wrapper_element' => 'dropdown'
 );

 wp_list_categories($args);
 ?>
 }}}


 and in `wp_list_categories` we add this before the $html gets returned
 from the function.

 {{{#!php
 <?php
 $html = apply_filters( 'wp_list_categories', $output, $args );
 if( isset($r['html_wrapper_element'])  && $r['html_wrapper_element'] ===
 'dropdown') {
   $html = '<select>' . $html . '</select>';
 }

 if ( $r['echo'] ) {
   echo $html;
 } else {
   return $html;
 }
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/41882>
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