简单的问题,当我没有选择任何单选按钮时,我收到错误消息 Undefined index: gender
<?PHP
if(isset($_POST['register'])){
$gender=$_POST['gender'];
echo $gender;
}
?>
<html>
<form action="testing.php" method="POST">
<input type="radio" name="gender" value="male" />Male
<input type="radio" name="gender" value="female" />Female
<input type="submit" name="register" value="Register" />
</form>
</html>