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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 |
|---|---|
| 622 | /** |
| 623 | * Fires before meta boxes with 'side' context are output for all post types other than 'page'. |
| 624 | * |
| 625 | * The submitpost box is a meta box with 'side' context, so this hook fires just before it is output. |
| 626 | * |
| 627 | * @since 2.5.0 |
| 628 | * |
| 629 | * @param WP_Post $post Post object. |
| 630 | */ |
| 631 | do_action( 'submitpost_box', $post ); |
| 632 | } |
| 633 | |
| 634 | |
| 635 | do_meta_boxes( $post_type, 'side', $post ); |
| 636 | |
| 637 | ?> |
| 638 | </div> |
| 639 | <div id="postbox-container-2" class="postbox-container"> |
| 640 | <?php |