<?php class ClientIPGetter { private $authorized_proxies = []; function __construct($proxies = '') { if (is_string($proxies) && !empty(trim($proxies))) { $this->authorized_proxies = array_map('trim',explode(',',$proxies)); } else if (is_array($proxies) && !empty($proxies)) { foreach ($proxies as $p) { if (is_string($p)) { $p = trim($p); if ($p) {$this->authorized_proxies[] = $p;} } } } else { $this->authorized_proxies = !!$proxies; } } public function get_proxies() { return $this->authorized_proxies; } public static function get_ip_version(string $ip) { $ip = explode('/', $ip)[0]; if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) { return 4; } if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) { return 6; } return 0; } public static function ip_compare($ip, $other) { $ip_ver = static::get_ip_version($ip); if ($ip_ver != static::get_ip_version($other)) { return false; } switch ($ip_ver) { case 4: return $ip == $other; case 6: return inet_pton($ip) == inet_pton($other); default: return false; } } public static function inet_to_bits($inet) { $splitted = str_split($inet); $binaryip = ''; foreach ($splitted as $char) { $binaryip .= str_pad(decbin(ord($char)), 8, '0', STR_PAD_LEFT); } return $binaryip; } public static function ip_in_range(string $ip, string $range) { try { $ip_ver = static::get_ip_version($ip); if ($ip_ver != static::get_ip_version($range)) { return false; } switch ($ip_ver) { case 4: list ($subnet, $bits) = explode('/', $range); if ($bits === null) { $bits = 32; } $ip = ip2long($ip); $subnet = ip2long($subnet); $mask = -1 << (32 - $bits); $subnet &= $mask; return ($ip & $mask) == $subnet; case 6: $ip = inet_pton($ip); $binaryip= static::inet_to_bits($ip); list($net,$maskbits)= explode('/',$range); $net=inet_pton($net); $binarynet = static::inet_to_bits($net); $ip_net_bits = substr($binaryip,0,$maskbits); $net_bits = substr($binarynet,0,$maskbits); return $ip_net_bits==$net_bits; default: return false; } } catch (Exception $e) { return false; } } public function get_client_ip() { $ip = ''; $authorized_proxy = false; if (is_bool($this->authorized_proxies)) { $authorized_proxy = $this->authorized_proxies; } else if (!empty($this->authorized_proxies)) { foreach($this->authorized_proxies as $p) { if (strpos($p, '/') !== false) { if (static::ip_in_range($_SERVER['REMOTE_ADDR'], $p)) { $authorized_proxy = true; break; } } else if (static::ip_compare($_SERVER['REMOTE_ADDR'], $p)) { $authorized_proxy = true; break; } } } if ($authorized_proxy) { if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { $fwd_ips = explode( ',', $_SERVER['HTTP_X_FORWARDED_FOR'] ); $ip = trim(end($fwd_ips)); } else if (!empty($_SERVER['HTTP_CLIENT_IP'])) { $ip = $_SERVER['HTTP_CLIENT_IP']; } } if (!$ip) {$ip = $_SERVER['REMOTE_ADDR'];} return $ip; } } 

<?php class ClientIPGetter { private $authorized_proxies = []; function __construct($proxies = '') { if (is_string($proxies) && !empty(trim($proxies))) { $this->authorized_proxies = array_map('trim',explode(',',$proxies)); } else if (is_array($proxies) && !empty($proxies)) { foreach ($proxies as $p) { if (is_string($p)) { $p = trim($p); if (static::get_ip_version($p)) { $this->authorized_proxies[] = $p; } } } } else { $this->authorized_proxies = !!$proxies; } } public function get_proxies() { return $this->authorized_proxies; } public static function get_ip_version(string $ip) { $ip = explode('/', $ip)[0]; if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) { return 4; } if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) { return 6; } return 0; } public static function ip_compare($ip, $other) { $ip_ver = static::get_ip_version($ip); if ($ip_ver != static::get_ip_version($other)) { return false; } switch ($ip_ver) { case 4: return $ip == $other; case 6: return inet_pton($ip) == inet_pton($other); default: return false; } } public static function inet_to_bits($inet) { $splitted = str_split($inet); $binaryip = ''; foreach ($splitted as $char) { $binaryip .= str_pad(decbin(ord($char)), 8, '0', STR_PAD_LEFT); } return $binaryip; } public static function ip_in_range(string $ip, string $range) { try { $ip_ver = static::get_ip_version($ip); if ($ip_ver != static::get_ip_version($range)) { return false; } switch ($ip_ver) { case 4: list ($subnet, $bits) = explode('/', $range); if ($bits === null) { $bits = 32; } $ip = ip2long($ip); $subnet = ip2long($subnet); $mask = -1 << (32 - $bits); $subnet &= $mask; return ($ip & $mask) == $subnet; case 6: $ip = inet_pton($ip); $binaryip= static::inet_to_bits($ip); list($net,$maskbits)= explode('/',$range); $net=inet_pton($net); $binarynet = static::inet_to_bits($net); $ip_net_bits = substr($binaryip,0,$maskbits); $net_bits = substr($binarynet,0,$maskbits); return $ip_net_bits==$net_bits; default: return false; } } catch (Exception $e) { return false; } } public function get_client_ip() { $ip = ''; $authorized_proxy = false; if (is_bool($this->authorized_proxies)) { $authorized_proxy = $this->authorized_proxies; } else if (!empty($this->authorized_proxies)) { foreach($this->authorized_proxies as $p) { if (strpos($p, '/') !== false) { if (static::ip_in_range($_SERVER['REMOTE_ADDR'], $p)) { $authorized_proxy = true; break; } } else if (static::ip_compare($_SERVER['REMOTE_ADDR'], $p)) { $authorized_proxy = true; break; } } } if ($authorized_proxy) { if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { $fwd_ips = explode( ',', $_SERVER['HTTP_X_FORWARDED_FOR'] ); $ip = trim(end($fwd_ips)); } else if (!empty($_SERVER['HTTP_CLIENT_IP'])) { $ip = $_SERVER['HTTP_CLIENT_IP']; } } if (!$ip) {$ip = $_SERVER['REMOTE_ADDR'];} return $ip; } }