Are there any best practices for securely integrating SSL into PHP websites?

To securely integrate SSL into PHP websites, it is important to ensure that all sensitive data is transmitted over HTTPS to encrypt the communication between the server and the client. This can be achieved by configuring the web server to use SSL/TLS certificates and updating the website URLs to use HTTPS. Additionally, it is recommended to set the "secure" flag on cookies to ensure they are only sent over secure connections.

// Force HTTPS redirection
if($_SERVER["HTTPS"] != "on") {
    header("Location: https://" . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"]);
    exit();
}

// Set "secure" flag on cookies
ini_set('session.cookie_secure', 1);