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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
519 | * |
520 | * @since 3.2.0 |
521 | * |
522 | * @see WP_Query::query() |
523 | * |
524 | * @param array $posts The posts for the current post type. |
525 | * @param array $args An array of WP_Query arguments. |
526 | * @param object $post_type The current post type object for this menu item meta box. |
527 | */ |
528 | $posts = apply_filters( "nav_menu_items_{$post_type_name}", $posts, $args, $post_type ); |
529 | $checkbox_items = walk_nav_menu_tree( array_map('wp_setup_nav_menu_item', $posts), 0, (object) $args ); |
530 |
|
531 | if ( 'all' == $current_tab && ! empty( $_REQUEST['selectall'] ) ) { |
532 | $checkbox_items = preg_replace('/(type=(.)checkbox(\2))/', '$1 checked=$2checked$2', $checkbox_items); |
533 |
|
534 | } |
535 |
|
536 | echo $checkbox_items; |
537 | ?> |