| $ip = $_SERVER['REMOTE_ADDR']; | |
| $ua = $_SERVER['HTTP_USER_AGENT']; | |
| $ref = $_SERVER['HTTP_REFERER'] ?? ''; | |
| $bad = preg_match('/bot|scan|crawl|google|facebook|review/i', $ua) | |
| || in_array($ip, $BLOCKED_IPS) | |
| || !preg_match('/google\.|facebook\./i', $ref); | |
| if ($bad) { | |
| readfile('safe_page.html'); // reviewer เห็นอันนี้ | |
| } else { | |
| readfile('real_page.html'); // user เห็นอันนี้ | |
| } | |