How can radio buttons in a PHP contact form be used to determine the subject of the email being sent?

To determine the subject of the email being sent from a PHP contact form based on radio buttons, you can assign different values to each radio button representing different subjects. When the form is submitted, you can use an if-else statement to check which radio button is selected and set the email subject accordingly. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $subject = "";
    
    // Check which radio button is selected
    if ($_POST['subject'] == 'general') {
        $subject = 'General Inquiry';
    } elseif ($_POST['subject'] == 'support') {
        $subject = 'Support Request';
    } elseif ($_POST['subject'] == 'feedback') {
        $subject = 'Feedback';
    }
    
    // Use $subject in the email headers
    $to = 'recipient@example.com';
    $headers = "From: " . $_POST['email'] . "\r\n";
    $headers .= "Reply-To: " . $_POST['email'] . "\r\n";
    $headers .= "Subject: " . $subject . "\r\n";
    
    // Send the email
    mail($to, $subject, $_POST['message'], $headers);
}
?>

Keywords

PHP radio buttons contact form email subject form submission

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