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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 |
---|---|
556 | * Filters the number of revisions to save for the given post. |
557 | * |
558 | * Overrides the value of WP_POST_REVISIONS. |
559 | * |
560 | * @since 3.6.0 |
561 | * |
562 | * @param int $num Number of revisions to store. |
563 | * @param WP_Post $post Post object. |
564 | */ |
565 | return (int) apply_filters( 'wp_revisions_to_keep', $num, $post ); |
566 | } |
567 |
|
568 | /** |
569 | * Sets up the post object for preview based on the post autosave. |
570 | * |
571 | * @since 2.7.0 |
572 | * @access private |
573 | * |
574 | * @param WP_Post $post |