How to access a form element in PHP

[Saumier]

Joomla 2.5.9 Fab 3.0.8

I've been all over the WIKI and forum, and everything I've found doesn't work for me. Here's what I want to do:
I have a radio button; 0 = No 1 = Yes
The next field is a text field that is not required if radio button = 0, but is required if radio button = 1.
I'm trying to write the condition in PHP for notempty validation on the text element to run or not. My biggest problem is the coding to access the radio button element.
I sure would appreciate help on how to do that.
Thanks.

 

[jfquestiaux]

If the name of your radio button element is "radio" and the corresponding database table is "mytable", you should write

return $data['mytable___radio_raw'] == 1;

in the condition box of your notempty validation

 

[cheesegrits]

Not that for some elements, the data you get from $data can be an array, not a simple value, for things like radio buttons, checkboxes, etc. The best way to handle that is by doing this

$radio_value = $data['mytable___radio_raw'];
$radio_value = is_array($radio_value) ? $radio_value[0] : $radio_value;
return $radio_value == '1';

-- hugh