/**
* Get system ipv4 addresses.
* Works on Linux only.
* @return [array]
*/
function getSystemIPs() {
$ips = shell_exec('hostname -I');
$ips = preg_split('/\s+/', $ips, -1, PREG_SPLIT_NO_EMPTY);
foreach ($ips as $ip) {
if (filter_var($ip,
FILTER_VALIDATE_IP,
FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
$ip_a[] = $ip;
}
}
return $ip_a;
}