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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 |
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537 | * @since 3.2.0 |
538 | * @since 4.6.0 Converted the `$post_type` parameter to accept a WP_Post_Type object. |
539 | * |
540 | * @see WP_Query::query() |
541 | * |
542 | * @param array $posts The posts for the current post type. |
543 | * @param array $args An array of WP_Query arguments. |
544 | * @param WP_Post_Type $post_type The current post type object for this menu item meta box. |
545 | */ |
546 | $posts = apply_filters( "nav_menu_items_{$post_type_name}", $posts, $args, $post_type ); |
547 |
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548 | $checkbox_items = walk_nav_menu_tree( array_map('wp_setup_nav_menu_item', $posts), 0, (object) $args ); |
549 |
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550 | if ( 'all' == $current_tab && ! empty( $_REQUEST['selectall'] ) ) { |
551 | $checkbox_items = preg_replace('/(type=(.)checkbox(\2))/', '$1 checked=$2checked$2', $checkbox_items); |
552 |
|
553 | } |
554 |
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555 | echo $checkbox_items; |