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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 |
|---|---|
| 6503 | |
| 6504 | /** |
| 6505 | * Fires when a post's status is transitioned from private to published. |
| 6506 | * |
| 6507 | * @since 1.5.0 |
| 6508 | * @deprecated 2.3.0 Use 'private_to_publish' instead. |
| 6509 | * |
| 6510 | * @param int $post_id Post ID. |
| 6511 | */ |
| 6512 | do_action( 'private_to_published', $post->ID ); |
| 6513 | } |
| 6514 | |
| 6515 | // If published posts changed clear the lastpostmodified cache. |
| 6516 | if ( 'publish' == $new_status || 'publish' == $old_status ) { |
| 6517 | foreach ( array( 'server', 'gmt', 'blog' ) as $timezone ) { |
| 6518 | wp_cache_delete( "lastpostmodified:$timezone", 'timeinfo' ); |
| 6519 | wp_cache_delete( "lastpostdate:$timezone", 'timeinfo' ); |
| 6520 | wp_cache_delete( "lastpostdate:$timezone:{$post->post_type}", 'timeinfo' ); |
| 6521 | } |