Radio buttons in PHP code are handled by first defining them within an HTML form and then processing their selected value using PHP when the form is submitted.

1. HTML Form with Radio Buttons:

Create an HTML form containing the radio buttons. It is crucial that all radio buttons within a group (where only one can be selected) share the same name attribute but have distinct value attributes.

1. HTML Form with Radio Buttons:

Create an HTML form containing the radio buttons. It is crucial that all radio buttons within a group (where only one can be selected) share the same name attribute but have distinct value attributes.

2. PHP Processing (process_radio.php):

In the PHP file specified in the form's action attribute (e.g., process_radio.php), you can retrieve the selected radio button's value using the $_POST superglobal array.

<?php
if (isset($_POST['submit_button'])) {
    if (isset($_POST['fav_color'])) {
        $selectedColor = $_POST['fav_color'];
        echo "You selected: " . htmlspecialchars($selectedColor);
    } else {
        echo "No color was selected.";
    }
}
?>