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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 |
|---|---|
| 674 | * |
| 675 | * - `wp_post_revisions_to_keep` |
| 676 | * - `wp_page_revisions_to_keep` |
| 677 | * |
| 678 | * @since 5.8.0 |
| 679 | * |
| 680 | * @param int $num Number of revisions to store. |
| 681 | * @param WP_Post $post Post object. |
| 682 | */ |
| 683 | $num = apply_filters( "wp_{$post->post_type}_revisions_to_keep", $num, $post ); |
| 684 | |
| 685 | return (int) $num; |
| 686 | } |
| 687 | |
| 688 | /** |
| 689 | * Sets up the post object for preview based on the post autosave. |
| 690 | * |
| 691 | * @since 2.7.0 |
| 692 | * @access private |