Log::writeToFile

static function writeToFile($fileName, $data, $title = '')
{
	$log = "n------------------------n";
	$log .= date("Y.m.d G:i:s")."n";
	if ($title <> '')
	{
		$log .= $title."n";
	}
	$log .= print_r($data, 1);
	$log .= "n------------------------n";

	if (function_exists('BXSiteLog'))
	{
		BXSiteLog($fileName, $log);
	}
	else
	{
		BitrixMainIOFile::putFileContents($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/".$fileName, $log, BitrixMainIOFile::APPEND);
	}

	return true;
}