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- function get_ip_address() {
- if (!empty($_SERVER['HTTP_CLIENT_IP']) && validate_ip($_SERVER['HTTP_CLIENT_IP'])) {
- return $_SERVER['HTTP_CLIENT_IP'];
- }
- if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
- if (strpos($_SERVER['HTTP_X_FORWARDED_FOR'], ',') !== false) {
- $iplist = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
- foreach ($iplist as $ip) {
- if (validate_ip($ip))
- return $ip;
- }
- } else {
- if (validate_ip($_SERVER['HTTP_X_FORWARDED_FOR']))
- return $_SERVER['HTTP_X_FORWARDED_FOR'];
- }
- }
- if (!empty($_SERVER['HTTP_X_FORWARDED']) && validate_ip($_SERVER['HTTP_X_FORWARDED']))
- return $_SERVER['HTTP_X_FORWARDED'];
- if (!empty($_SERVER['HTTP_X_CLUSTER_CLIENT_IP']) && validate_ip($_SERVER['HTTP_X_CLUSTER_CLIENT_IP']))
- return $_SERVER['HTTP_X_CLUSTER_CLIENT_IP'];
- if (!empty($_SERVER['HTTP_FORWARDED_FOR']) && validate_ip($_SERVER['HTTP_FORWARDED_FOR']))
- return $_SERVER['HTTP_FORWARDED_FOR'];
- if (!empty($_SERVER['HTTP_FORWARDED']) && validate_ip($_SERVER['HTTP_FORWARDED']))
- return $_SERVER['HTTP_FORWARDED'];
- return $_SERVER['REMOTE_ADDR'];
- }
- function validate_ip($ip) {
- if (strtolower($ip) === 'unknown')
- return false;
- $ip = ip2long($ip);
- if ($ip !== false && $ip !== -1) {
- $ip = sprintf('%u', $ip);
- if ($ip >= 0 && $ip <= 50331647) return false;
- if ($ip >= 167772160 && $ip <= 184549375) return false;
- if ($ip >= 2130706432 && $ip <= 2147483647) return false;
- if ($ip >= 2851995648 && $ip <= 2852061183) return false;
- if ($ip >= 2886729728 && $ip <= 2887778303) return false;
- if ($ip >= 3221225984 && $ip <= 3221226239) return false;
- if ($ip >= 3232235520 && $ip <= 3232301055) return false;
- if ($ip >= 4294967040) return false;
- }
- return true;
- }
- $_SERVER["REMOTE_ADDR"] = get_ip_address();
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