final protected function _defaults($arr)
	{
		$defaults = array(
			'error_handler' => '', 
			'use_builtin_error_handler' => false, 
			'time_limit' => 0, 
			'log_to_file' => null, 
			'log_to_syslog' => null, 
			'masking' => true, 
			);
		
		$arr = array_merge($defaults, $arr);
		
		return $arr;
	}