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How can i check which radio button has been checked from a list of radio buttons ? Is there any key in the form array which holds the checked radio ?

I am using an ajax call for a bunch of radios buttons and i would like to do some "checking" only if the right radio button was selected.

As an alternative , how can i append the "#ajax" parameter to only one radio button in a list of radio buttons ?

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  • Tell us what your trying to achieve?
    – Alex Gill
    Jan 9 '13 at 11:50
  • @AlexGill was i clear enough ?
    – Vlasin
    Jan 9 '13 at 11:55
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You can check the element's value in $form_state['values']. Add the full parameter list ($form, &$form_state) to the form builder function.

For example: function mymodule_something_form($form, &$form_state) {

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