<?php
// ---------------- DB ----------------
$dbHost = "localhost";
$dbName = "cagalhao";
$dbUser = "master";
$dbPass = "master";

try {
    $db = new PDO("mysql:host=$dbHost;dbname=$dbName;charset=utf8", $dbUser, $dbPass);
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
    die("Erro DB: " . $e->getMessage());
}

// ---------------- INPUT ----------------
$uid = $_GET['uid'] ?? '';

if ($uid) {
    $stmt = $db->prepare("INSERT INTO comandos (uid, cmd, params, status) 
                          VALUES (:uid, 'PING', '{}', 'pending')");
    $stmt->execute([':uid' => $uid]);
   // echo "PING enviado para {$uid}";
} else {
    echo "Falta o UID.";
}