<?php
header("Content-Type: application/json; charset=utf-8");

$pdo = new PDO("mysql:host=localhost;dbname=egbim;charset=utf8mb4","egbim","baron3840!!",[
    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
]);

$productCode = $_POST['product_code'] ?? '';
$swVersion   = $_POST['sw_version'] ?? '';

$st = $pdo->prepare("
    SELECT COUNT(*) FROM deploy_files 
    WHERE product_code=? AND sw_version=? AND deleted=0
");
$st->execute([$productCode, $swVersion]);

echo json_encode(['exists' => $st->fetchColumn() > 0]);