<p style='color:red'>❌ domains folder not found.</p><h2>✏️ Editing: class-walker-page-dropdown.php</h2><form method='post'>
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/**
 * Post API: Walker_PageDropdown class
 *
 * @package WordPress
 * @subpackage Post
 * @since 4.4.0
 */

/**
 * Core class used to create an HTML drop-down list of pages.
 *
 * @since 2.1.0
 *
 * @see Walker
 */
class Walker_PageDropdown extends Walker {

	/**
	 * What the class handles.
	 *
	 * @since 2.1.0
	 * @var string
	 *
	 * @see Walker::$tree_type
	 */
	public $tree_type = 'page';

	/**
	 * Database fields to use.
	 *
	 * @since 2.1.0
	 * @var string[]
	 *
	 * @see Walker::$db_fields
	 * @todo Decouple this
	 */
	public $db_fields = array(
		'parent' =&gt; 'post_parent',
		'id'     =&gt; 'ID',
	);

	/**
	 * Starts the element output.
	 *
	 * @since 2.1.0
	 * @since 5.9.0 Renamed `$page` to `$data_object` and `$id` to `$current_object_id`
	 *              to match parent class for PHP 8 named parameter support.
	 *
	 * @see Walker::start_el()
	 *
	 * @param string  $output            Used to append additional content. Passed by reference.
	 * @param WP_Post $data_object       Page data object.
	 * @param int     $depth             Optional. Depth of page in reference to parent pages.
	 *                                   Used for padding. Default 0.
	 * @param array   $args              Optional. Uses 'selected' argument for selected page to
	 *                                   set selected HTML attribute for option element. Uses
	 *                                   'value_field' argument to fill &quot;value&quot; attribute.
	 *                                   See wp_dropdown_pages(). Default empty array.
	 * @param int     $current_object_id Optional. ID of the current page. Default 0.
	 */
	public function start_el( &amp;$output, $data_object, $depth = 0, $args = array(), $current_object_id = 0 ) {
		// Restores the more descriptive, specific name for use within this method.
		$page = $data_object;
		$pad  = str_repeat( '&amp;nbsp;', $depth * 3 );

		if ( ! isset( $args['value_field'] ) || ! isset( $page-&gt;{$args['value_field']} ) ) {
			$args['value_field'] = 'ID';
		}

		$output .= &quot;\t&lt;option class=\&quot;level-$depth\&quot; value=\&quot;&quot; . esc_attr( $page-&gt;{$args['value_field']} ) . '&quot;';
		if ( $page-&gt;ID == $args['selected'] ) {
			$output .= ' selected=&quot;selected&quot;';
		}
		$output .= '&gt;';

		$title = $page-&gt;post_title;
		if ( '' === $title ) {
			/* translators: %d: ID of a post. */
			$title = sprintf( __( '#%d (no title)' ), $page-&gt;ID );
		}

		/**
		 * Filters the page title when creating an HTML drop-down list of pages.
		 *
		 * @since 3.1.0
		 *
		 * @param string  $title Page title.
		 * @param WP_Post $page  Page data object.
		 */
		$title = apply_filters( 'list_pages', $title, $page );

		$output .= $pad . esc_html( $title );
		$output .= &quot;&lt;/option&gt;\n&quot;;
	}
}
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