Get value of contact form 7 radio button


favorite  I have following radio buttons in contact form 7 and a few text fields and hidden fields.

[radio radio id:radio label_first "3" "6" "9" "12"]  

Following are a few example lines of code in functions.php. I am able to get all the other values e.g text fields and hidden fields but not radio buttons.

function wpcf7_cstm_function($contact_form) {   $title = $contact_form->title;   $submission = WPCF7_Submission::get_instance();
if ($submission) {   $posted_data = $submission->get_posted_data();   }  $txt = $posted_data['txt'];   $text2 = $posted_data['txt2'];  $radio=$posted_data['radio'];   }  

Is there a way to get the value of selected radio button?


okay so i was able to get the value of the radio button through javascript on the page and assigning it's value to a hidden field in the form.