/**
* Cleans backups when there are too many backup files (backuplimit exceed)
*/
private static function clean()
{
$limit = App::backupLimit();
if ($limit !== false) {
$backups = App::backups()->files();
sort($backups);
$to_remove = count($backups) - $limit;
if ($to_remove > 0) {
$i = 0;
while ($i < $to_remove) {
$backups[$i]->remove();
++$i;
}
}
}
}
