seotools
200) { http_response_code(429); die(' Rate limit reached. Try later. '); } // ---------------------- helpers ---------------------- function safe_url($url) { $url = trim($url); if (!preg_match('#^https?://#i', $url)) return false; $parts = parse_url($url); if (!$parts || !isset($parts['host'])) return false; $host = $parts['host']; // resolve host IP and refuse private ranges $ip = gethostbyname($host); if (!$ip) return false; $private_prefixes = ['10.', '172.16.', '172.17.', '172.18.', '172.19.', '172.20.', '172.21.', '172.22.', '172.23.', '172.24.', '172.25.', '172.26.', '172.27.', '172.28.', '172.29.', '172.30.', '172.31.', '192.168.', '127.']; foreach ($private_prefixes as $p) { if (strpos($ip, $p) === 0) return false; } return $url; }...