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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 |
---|---|
640 | 'post_type' => $post->post_type, |
641 | 'exclude_tree' => $post->ID, |
642 | 'selected' => $post->post_parent, |
643 | 'name' => 'parent_id', |
644 | 'show_option_none' => __('(no parent)'), |
645 | 'sort_column' => 'menu_order, post_title', |
646 | 'echo' => 0, |
647 | ); |
648 |
|
649 | $dropdown_args = apply_filters( 'page_attributes_dropdown_pages_args', $dropdown_args, $post ); |
650 | $pages = wp_dropdown_pages( $dropdown_args ); |
651 | if ( ! empty($pages) ) { |
652 | ?> |
653 | <p><strong><?php _e('Parent') ?></strong></p> |
654 | <label class="screen-reader-text" for="parent_id"><?php _e('Parent') ?></label> |
655 | <?php echo $pages; ?> |
656 | <?php |
657 | } // end empty pages check |
658 | } // end hierarchical check. |