How could I validate a checkbox and radiobutton input using PHP? I wish to display a message if there's no selected value from checkbox or radiobutton. I tried this for my checkbox.

$check = $_POST["checkbox"];

echo "You need to select at least one from the checkboxes";

It doesn't work. Also, how could I do it with radiobutton?

Post your html code of checkbox and radiobutton...

I think it was caused by the isset function around it. It looks to me that I'm double checking it by using the isset function and empty function, that's why it didn't work.

I solved it by removing the isset function.