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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 |
---|---|
4180 | * @param object $post Object type containing the post information |
4181 | */ |
4182 | function _transition_post_status($new_status, $old_status, $post) { |
4183 | global $wpdb; |
4184 |
|
4185 | if ( $old_status != 'publish' && $new_status == 'publish' ) { |
4186 | // Reset GUID if transitioning to publish and it is empty |
4187 | if ( '' == get_the_guid($post->ID) ) |
4188 | $wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post->ID ) ), array( 'ID' => $post->ID ) ); |
4189 | do_action('private_to_published', $post->ID); // Deprecated, use private_to_publish |
4190 | } |
4191 |
|
4192 | // If published posts changed clear the lastpostmodified cache |
4193 | if ( 'publish' == $new_status || 'publish' == $old_status) { |
4194 | wp_cache_delete( 'lastpostmodified:server', 'timeinfo' ); |
4195 | wp_cache_delete( 'lastpostmodified:gmt', 'timeinfo' ); |
4196 | wp_cache_delete( 'lastpostmodified:blog', 'timeinfo' ); |
4197 | } |
4198 |
|