如何在PHP(CLI)中找到服务器的IP地址

function getServerIpAddress() {
    $os = PHP_OS;
    if (strtoupper(substr($os, 0, 3)) === 'WIN') {
        $output = shell_exec('ipconfig');
        preg_match('/IPv4 Address.*?(\d+\.\d+\.\d+\.\d+)/s', $output, $matches);
    } else {
        $output = shell_exec('ifconfig');
        preg_match('/inet (\d+\.\d+\.\d+\.\d+)/s', $output, $matches);
    }
    return isset($matches[1]) ? $matches[1] : '';
}

$serverIpAddress = getServerIpAddress();
echo "服务器 IP 地址：{$serverIpAddress}";

$serverIpAddress = $_SERVER['SERVER_ADDR'];
echo "服务器 IP 地址：{$serverIpAddress}";