[PHP] Detect User Client IP XAMPP or Localhost Machine Supported


Usage: var_dump(get_client_ip());

/**
* Detect is localhost
*
* @return boolean
*/
function isLocalHost()
{
$whitelist = [
'127.0.0.1',
'::1',
];

return in_array($_SERVER['REMOTE_ADDR'], $whitelist);
}

/**
* Get client ip, when getenv supported (maybe cli)
*
* @return string
*/
function get_client_ip()
{
$ipaddress = '';

if (isLocalHost()) {
$ipaddress = getLocalIp();
} else {
if (getenv('HTTP_CLIENT_IP')) {
$ipaddress = getenv('HTTP_CLIENT_IP');
} elseif (getenv('HTTP_X_FORWARDED_FOR')) {
$ipaddress = getenv('HTTP_X_FORWARDED_FOR');
} elseif (getenv('HTTP_X_FORWARDED')) {
$ipaddress = getenv('HTTP_X_FORWARDED');
} elseif (getenv('HTTP_FORWARDED_FOR')) {
$ipaddress = getenv('HTTP_FORWARDED_FOR');
} elseif (getenv('HTTP_FORWARDED')) {
$ipaddress = getenv('HTTP_FORWARDED');
} elseif (getenv('REMOTE_ADDR')) {
$ipaddress = $ipaddress = getenv('REMOTE_ADDR');
} else {
/**
* Return to method 2
*/
$ipaddress = get_client_ip2();
}
}

return $ipaddress;
}

/**
* Get client ip, when running on webserver
*
* @return void
*/
function get_client_ip2()
{
$ipaddress = '';
if (isLocalHost()) {
$ipaddress = getLocalIp();
} else {
if (isset($_SERVER['HTTP_CLIENT_IP'])) {
$ipaddress = $_SERVER['HTTP_CLIENT_IP'];
} elseif (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
} elseif (isset($_SERVER['HTTP_X_FORWARDED'])) {
$ipaddress = $_SERVER['HTTP_X_FORWARDED'];
} elseif (isset($_SERVER['HTTP_FORWARDED_FOR'])) {
$ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
} elseif (isset($_SERVER['HTTP_FORWARDED'])) {
$ipaddress = $_SERVER['HTTP_FORWARDED'];
} elseif (isset($_SERVER['REMOTE_ADDR'])) {
$ipaddress = $_SERVER['REMOTE_ADDR'];
} else {
$ipaddress = 'UNKNOWN';
}
}

return $ipaddress;
}

function getLocalIp()
{
if (defined('PHP_MAJOR_VERSION') && PHP_MAJOR_VERSION >= 5) {
$localIP = gethostbyname(gethostname());
} else {
$localIP = gethostbyname(php_uname('n'));
}

return $localIP;
}