QuickBooks/Utilities.php
static public function log($dsn, $msg, $lvl = QUICKBOOKS_LOG_NORMAL)
	{
		$Driver = QuickBooks_Utilities::driverFactory($dsn);
		
		// Mask important data
		$msg = QuickBooks_Utilities::mask($msg);
		
		return $Driver->log($msg, null, $lvl);
	}
static public function log($dsn, $msg, $lvl = QUICKBOOKS_LOG_NORMAL)
	{
		$Driver = QuickBooks_Utilities::driverFactory($dsn);
		
		// Mask important data
		$msg = QuickBooks_Utilities::mask($msg);
		
		return $Driver->log($msg, null, $lvl);
	}
Write a message to the log (via the back-end driver)

@param string $dsn		The DSN connection string to the logger
@param string $msg		The message to log
@param integer $lvl		The message log level
@return boolean			Whether or not the message was logged