if($retval==0||($backup_mode!='userzip'&&$retval==1)||($backup_mode=='userzip'&&$retval==12)){// tar can return 1, zip can return 12(due to harmless warings) and still create valid backups
if($retval==0||($backup_mode!='userzip'&&$retval==1)||($backup_mode=='userzip'&&$retval==12)){// tar can return 1, zip can return 12(due to harmless warings) and still create valid backups