How to get site URL protocol?

Notes:

• you should look also for HTTP_X_FORWARDED_PROTO (e.g. if proxy server)
• relying on 443 port is not safe (https could be served on different port)
• REQUEST_SCHEME not reliable

if (isset($_SERVER['HTTPS']) &&
    ($_SERVER['HTTPS'] == 'on' || $_SERVER['HTTPS'] == 1) ||
    isset($_SERVER['HTTP_X_FORWARDED_PROTO']) &&
    $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') {
    $protocol = 'https';
} else {
    $protocol = 'http';
}

Here is how I do it ... it is a shorthand if else version of Rid Iculous's answer ...

$protocol = isset($_SERVER['HTTPS']) && ($_SERVER['HTTPS'] === 'on' || $_SERVER['HTTPS'] === 1) || isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https' ? 'https' : 'http';

 

PHP Get Site URL Protocol - http vs https

PHP Get Site URL Protocol - http vs https