/**
* Get the user's IP
*
* @return string
*/
public static function getUserIp()
{
$ip = array();
foreach (array('HTTP_CF_CONNECTING_IP', 'HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_X_CLUSTER_CLIENT_IP', 'HTTP_FORWARDED_FOR', 'HTTP_FORWARDED', 'REMOTE_ADDR') as $key) {
if (array_key_exists($key, $_SERVER) === true) {
foreach (explode(',', $_SERVER[$key]) as $visitors_ip) {
$ip[] = str_replace(' ', '', $visitors_ip);
}
}
}
// If for some strange reason we don't get an IP we return imemdiately with 0.0.0.0
if (empty($ip)) {
return '0.0.0.0';
}
$ip = array_values(array_unique($ip));
$return = null;
// In PHP 5.3 and up the function filter_var can be used, much quicker as the regular expression check
if (AVH_Common::isPHP('5.3')) {
foreach ($ip as $i) {
if (filter_var($i, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE)) {
$return = $i;
break;
}
}
} else {
$dec_octet = '(?:\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])';
$ip4_address = $dec_octet . '.' . $dec_octet . '.' . $dec_octet . '.' . $dec_octet;
$match = array();
foreach ($ip as $i) {
if (preg_match('/^' . $ip4_address . '$/', $i, $match)) {
if (preg_match('/^(127\\.|10\\.|192\\.168\\.|172\\.((1[6-9])|(2[0-9])|(3[0-1]))\\.)/', $i)) {
continue;
} else {
$return = $i;
break;
}
}
}
}
if (null === $return) {
$return = '0.0.0.0';
}
return $return;
}
