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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 |
|---|---|
| 817 | * Filters the arguments used to generate a Pages drop-down element. |
| 818 | * |
| 819 | * @since 3.3.0 |
| 820 | * |
| 821 | * @see wp_dropdown_pages() |
| 822 | * |
| 823 | * @param array $dropdown_args Array of arguments used to generate the pages drop-down. |
| 824 | * @param WP_Post $post The current WP_Post object. |
| 825 | */ |
| 826 | $dropdown_args = apply_filters( 'page_attributes_dropdown_pages_args', $dropdown_args, $post ); |
| 827 | $pages = wp_dropdown_pages( $dropdown_args ); |
| 828 | if ( ! empty($pages) ) : |
| 829 | ?> |
| 830 | <p class="post-attributes-label-wrapper"><label class="post-attributes-label" for="parent_id"><?php _e( 'Parent' ); ?></label></p> |
| 831 | <?php echo $pages; ?> |
| 832 | <?php |
| 833 | endif; // end empty pages check |
| 834 | endif; // end hierarchical check. |
| 835 | |