How to disable direct visits to the site?

Question

htaccess

Hello. Please tell me how to disable all direct visits to the site in htaccess? Allow visits only from ps

Answer 1

if (empty($_SERVER['HTTP_REFERER'])) {
 echo 'реферер или 0, или пусто, или вообще не определена';
}
else {
echo 'реферер есть :)';
}

you can still dig deeper and read here htaccess.ru/info/referral-blocking
via hitachch xs but the first thing that came to mind :)