Mine

if (empty($gender))
		{
			$ErrorMessage = "<strong>Gender</strong> field is empty";
			
			$gender = $_REQUEST['gender'];
			
			if ($gender == 'M')
			{
				$genderMessage = '<p><b>Have a Good day, Sir!</b></p>';
				return $genderMessage;
			}
			elseif ($gender == 'F')
			{
				$genderMessage = '<p><b>Have a Good Day, Maddam!</b></p>';
				return $genderMessage;
			}