private function clearLog()
{
if (!self::$logCleared) {
self::$logCleared = true;
$fh = fopen("test-log.txt", "w");
fwrite($fh, "\n");
fclose($fh);
$fh = fopen("sql.txt", "w");
fwrite($fh, "\n");
fclose($fh);
}
}
