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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 |
|---|---|
| 668 | /** |
| 669 | * Fires before meta boxes with 'side' context are output for all post types other than 'page'. |
| 670 | * |
| 671 | * The submitpost box is a meta box with 'side' context, so this hook fires just before it is output. |
| 672 | * |
| 673 | * @since 2.5.0 |
| 674 | * |
| 675 | * @param WP_Post $post Post object. |
| 676 | */ |
| 677 | do_action( 'submitpost_box', $post ); |
| 678 | } |
| 679 | |
| 680 | |
| 681 | do_meta_boxes( $post_type, 'side', $post ); |
| 682 | |
| 683 | ?> |
| 684 | </div> |
| 685 | <div id="postbox-container-2" class="postbox-container"> |
| 686 | <?php |