WordPress Version: 6.3
/**
* Upgrades the revisions author, adds the current post as a revision and sets the revisions version to 1.
*
* @since 3.6.0
* @access private
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param WP_Post $post Post object.
* @param array $revisions Current revisions of the post.
* @return bool true if the revisions were upgraded, false if problems.
*/
function _wp_upgrade_revisions_of_post($post, $revisions)
{
global $wpdb;
// Add post option exclusively.
$lock = "revision-upgrade-{$post->ID}";
$now = time();
$result = $wpdb->query($wpdb->prepare("INSERT IGNORE INTO `{$wpdb->options}` (`option_name`, `option_value`, `autoload`) VALUES (%s, %s, 'no') /* LOCK */", $lock, $now));
if (!$result) {
// If we couldn't get a lock, see how old the previous lock is.
$locked = get_option($lock);
if (!$locked) {
/*
* Can't write to the lock, and can't read the lock.
* Something broken has happened.
*/
return false;
}
if ($locked > $now - HOUR_IN_SECONDS) {
// Lock is not too old: some other process may be upgrading this post. Bail.
return false;
}
// Lock is too old - update it (below) and continue.
}
// If we could get a lock, re-"add" the option to fire all the correct filters.
update_option($lock, $now);
reset($revisions);
$add_last = true;
do {
$this_revision = current($revisions);
$prev_revision = next($revisions);
$this_revision_version = _wp_get_post_revision_version($this_revision);
// Something terrible happened.
if (false === $this_revision_version) {
continue;
}
/*
* 1 is the latest revision version, so we're already up to date.
* No need to add a copy of the post as latest revision.
*/
if (0 < $this_revision_version) {
$add_last = false;
continue;
}
// Always update the revision version.
$update = array('post_name' => preg_replace('/^(\d+-(?:autosave|revision))[\d-]*$/', '$1-v1', $this_revision->post_name));
/*
* If this revision is the oldest revision of the post, i.e. no $prev_revision,
* the correct post_author is probably $post->post_author, but that's only a good guess.
* Update the revision version only and Leave the author as-is.
*/
if ($prev_revision) {
$prev_revision_version = _wp_get_post_revision_version($prev_revision);
// If the previous revision is already up to date, it no longer has the information we need :(
if ($prev_revision_version < 1) {
$update['post_author'] = $prev_revision->post_author;
}
}
// Upgrade this revision.
$result = $wpdb->update($wpdb->posts, $update, array('ID' => $this_revision->ID));
if ($result) {
wp_cache_delete($this_revision->ID, 'posts');
}
} while ($prev_revision);
delete_option($lock);
// Add a copy of the post as latest revision.
if ($add_last) {
wp_save_post_revision($post->ID);
}
return true;
}