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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 |