wp-includes/SimplePie/src/Cache/MySQL.php:311Set the last modified time to the current time
bool public function touch() { if ($this->mysql === null) { return false; } $query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `mtime` = :time WHERE `id` = :id'); $query->bindValue(':time', time()); $query->bindValue(':id', $this->id); return $query->execute() && $query->rowCount() > 0; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/SimplePie/src/Cache/MySQL.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.