protected function rotateLogFile()
{
if (file_exists($this->logFileUrl . '.lock')) {
return;
} else {
touch($this->logFileUrl . '.lock');
}
if ($this->logFilesToKeep === 0) {
unlink($this->logFileUrl);
} else {
for ($logFileCount = $this->logFilesToKeep; $logFileCount > 0; --$logFileCount) {
$rotatedLogFileUrl = $this->logFileUrl . '.' . $logFileCount;
if (file_exists($rotatedLogFileUrl)) {
if ($logFileCount == $this->logFilesToKeep) {
unlink($rotatedLogFileUrl);
} else {
rename($rotatedLogFileUrl, $this->logFileUrl . '.' . ($logFileCount + 1));
}
}
}
rename($this->logFileUrl, $this->logFileUrl . '.1');
}
unlink($this->logFileUrl . '.lock');
}