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

Thread began 6/21/2011 6:07 am by lightwalkercreations361768 | Last modified 7/05/2011 10:56 am by Jason Byrnes | 2240 views | 5 replies |

lightwalkercreations361768Beta Tester

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

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Jason ByrnesWebAssist

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



edit that to:

php:
<?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:
<?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

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lightwalkercreations361768Beta Tester

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.

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Jason ByrnesWebAssist

you're welcome

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lightwalkercreations361768Beta Tester

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

Attached Files
form_test.php.zip
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Jason ByrnesWebAssist

what is the error?

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

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