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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 |
|---|---|
| 5703 | |
| 5704 | /** |
| 5705 | * Fires when a post's status is transitioned from private to published. |
| 5706 | * |
| 5707 | * @since 1.5.0 |
| 5708 | * @deprecated 2.3.0 Use 'private_to_publish' instead. |
| 5709 | * |
| 5710 | * @param int $post_id Post ID. |
| 5711 | */ |
| 5712 | do_action('private_to_published', $post->ID); |
| 5713 | } |
| 5714 | |
| 5715 | // If published posts changed clear the lastpostmodified cache. |
| 5716 | if ( 'publish' == $new_status || 'publish' == $old_status) { |
| 5717 | foreach ( array( 'server', 'gmt', 'blog' ) as $timezone ) { |
| 5718 | wp_cache_delete( "lastpostmodified:$timezone", 'timeinfo' ); |
| 5719 | wp_cache_delete( "lastpostdate:$timezone", 'timeinfo' ); |
| 5720 | } |
| 5721 | } |