<?php
final class Transport {
    public static function https(array $server,string $trustedProxies=''): bool {
        if(in_array(strtolower((string)($server['HTTPS']??'')),['on','1','https'],true))return true;
        $trusted=array_filter(array_map('trim',explode(',',$trustedProxies)),static fn($ip)=>filter_var($ip,FILTER_VALIDATE_IP)!==false);
        return in_array($server['REMOTE_ADDR']??'',$trusted,true)&&strtolower(trim($server['HTTP_X_FORWARDED_PROTO']??''))==='https';
    }
}