How can PHP be used to securely transmit form data over SSL?

To securely transmit form data over SSL in PHP, you can use the $_SERVER['HTTPS'] variable to check if the connection is secure. If it is secure, you can proceed to process the form data. Additionally, you can set the form action to use the HTTPS protocol to ensure that the data is transmitted securely. 

if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on'){
    // Process form data securely
} else {
    // Redirect to a secure HTTPS connection
    header("Location: https://" . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"]);
    exit();
}

Keywords

PHP form data SSL encryption security

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