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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 |
|---|---|
| 443 | * |
| 444 | * The Filter button allows sorting by date and/or category on the |
| 445 | * Posts list table, and sorting by date on the Pages list table. |
| 446 | * |
| 447 | * @since 2.1.0 |
| 448 | * @since 4.4.0 The `$post_type` parameter was added. |
| 449 | * |
| 450 | * @param string $post_type The post type slug. |
| 451 | */ |
| 452 | do_action( 'restrict_manage_posts', $this->screen->post_type ); |
| 453 | |
| 454 | submit_button( __( 'Filter' ), 'button', 'filter_action', false, array( 'id' => 'post-query-submit' ) ); |
| 455 | } |
| 456 | |
| 457 | if ( $this->is_trash && current_user_can( get_post_type_object( $this->screen->post_type )->cap->edit_others_posts ) ) { |
| 458 | submit_button( __( 'Empty Trash' ), 'apply', 'delete_all', false ); |
| 459 | } |
| 460 | ?> |
| 461 | </div> |