Validating form fields if a particular value in a radio button is selected

Dear WebAssist,

Is there a way to be able to validate certain form fields only if a particular radio button is selected. For instance if I have a radio button that has option 1 and option 2. If option 1 is selected then Form Toolkit will validate textbox 1, but if the radio button option 2 is selected then validation toolkit will validate textbox 2 but not textbox 1 etc.

Would this be possible? and what would be the best way to do it?

Many thanks as always for your help

it takes a little bit of hand coding to accomplish this, but it can be done using server side validation.

Use the required / not blank / selection made validation type.

for the sever variable, click the lightning bolt and select the radio group, this will add code similar to:

<?php echo((isset($_POST["RadioGroup"]))?$_POST["RadioGroup"]:"") ?>

edit that to:

<?php echo((isset($_POST["RadioGroup"]) && $_POST["RadioGroup"] == "1")?$_POST["textfield"]:"ok") ?>

this tells it to check if Radio group has a value of 1. Id so, it passes the value of textfield for validation, if not it passes the value "ok" for validation which will pass.

add a second required validation, this time use the server variable:

<?php echo((isset($_POST["RadioGroup"]) && $_POST["RadioGroup"] == "2")?$_POST["textfield2"]:"ok") ?>

this checks the radio group for the value 2, if so, it validates the textfield2 form element

Dear Jason,

Thank you that make's perfect sense. Thank you for being so clear. I will give it a go. Many thanks as always for your support.

you're welcome

Dear Jason,

Thank you for your help. I tried following you example but I am getting a syntax error and I am afraid I do not know enough to fix it or know what might be happening. Could you take a look at where I have gone wrong. I have included the php file.

Many thanks as always

what is the error?

I need the exact error, including the line number to know where to look and what to look for.