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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 |
|---|---|
| 848 | * Filters the arguments used to generate a Pages drop-down element. |
| 849 | * |
| 850 | * @since 3.3.0 |
| 851 | * |
| 852 | * @see wp_dropdown_pages() |
| 853 | * |
| 854 | * @param array $dropdown_args Array of arguments used to generate the pages drop-down. |
| 855 | * @param WP_Post $post The current post. |
| 856 | */ |
| 857 | $dropdown_args = apply_filters( 'page_attributes_dropdown_pages_args', $dropdown_args, $post ); |
| 858 | $pages = wp_dropdown_pages( $dropdown_args ); |
| 859 | if ( ! empty($pages) ) : |
| 860 | ?> |
| 861 | <p class="post-attributes-label-wrapper"><label class="post-attributes-label" for="parent_id"><?php _e( 'Parent' ); ?></label></p> |
| 862 | <?php echo $pages; ?> |
| 863 | <?php |
| 864 | endif; // end empty pages check |
| 865 | endif; // end hierarchical check. |
| 866 | |