Question

how do I insert the data for a radio button a user selects?

Answer 1

Your question is not 100% clear to me, do you wanna know how to save a radio button input to a database or how to setup something where a user clicks a radiobutton and based on the selection he must fill out a form?

Assuming your HTML for your radio button is like this:

<input type="radio" name="choice" value="1"> Choice 1
<input type="radio" name="choice" value="2"> Choice 2

You can save that to your database by:

mysql_query("INSERT INTO TABLE (choice) VALUES ('".mysql_real_escape_string($_POST['choice'])."')") or die(mysql_error());

If you submit different fields based on the radiobutton that is selected you can just use:

if ($_POST['choice'] == 1) {
 // Do something with the input fields connected to choice1
} else {
// Do something with the input fields connected to choice2 (Assuming you only use 2 radio selects)
}

EDIT //

Based on your HTML FORM you can use the code below to insert the values into your database:

if (isset ($_POST['Submit'])) {

    if (empty ($_POST['CID'])) {

        echo 'You must fill out your Course ID, <a href="javascript:history.back(1)">Go back</a>.';

    } elseif (empty ($_POST['Time'])) {

        echo 'You must fill out the Time field, <a href="javascript:history.back(1)">Go back</a>.';

    } else {

        // Insert into mysql database
        mysql_query("INSERT INTO TABLE (CID, Time) VALUES ('".mysql_real_escape_string($_POST['CID'])."', '".mysql_real_escape_string($_POST['Time'])."')") or die (mysql_error());

        echo 'Thank you, your request has been submitted.';
    }

} else {

    echo 'Error : No Submit action has been placed.';

}

?>