diff --git a/debug_db.php b/debug_db.php
new file mode 100644
index 0000000..d6a102b
--- /dev/null
+++ b/debug_db.php
@@ -0,0 +1,54 @@
+<?php
+// File diagnostik - HAPUS setelah selesai debugging
+error_reporting(E_ALL);
+ini_set('display_errors', 1);
+header('Content-Type: text/plain');
+
+echo "=== PHP INFO ===\n";
+echo "PHP Version: " . PHP_VERSION . "\n\n";
+
+echo "=== ENV VARS ===\n";
+echo "DB_HOST: " . (getenv('DB_HOST') ?: '(not set - will use fallback: localhost)') . "\n";
+echo "DB_USER: " . (getenv('DB_USER') ?: '(not set - will use fallback: root)') . "\n";
+echo "DB_PASS: " . (getenv('DB_PASS') ? '***set***' : '(not set - will use empty string)') . "\n";
+echo "DB_NAME: " . (getenv('DB_NAME') ?: '(not set - will use fallback: webgis_spbu)') . "\n\n";
+
+echo "=== KONEKSI TEST ===\n";
+define('DB_HOST', getenv('DB_HOST') ?: 'localhost');
+define('DB_USER', getenv('DB_USER') ?: 'root');
+define('DB_PASS', getenv('DB_PASS') ?: '');
+define('DB_NAME', getenv('DB_NAME') ?: 'webgis_spbu');
+
+mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
+
+try {
+    $conn = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
+    $conn->set_charset('utf8mb4');
+    echo "KONEKSI: BERHASIL!\n";
+    echo "Host: " . DB_HOST . "\n";
+    echo "Database: " . DB_NAME . "\n";
+    echo "User: " . DB_USER . "\n\n";
+
+    echo "=== CEK TABEL ===\n";
+    $tables = ['users', 'spbu', 'rumah_ibadah', 'penduduk_miskin'];
+    foreach ($tables as $table) {
+        $result = $conn->query("SHOW TABLES LIKE '$table'");
+        $exists = $result->num_rows > 0;
+        echo "Tabel '$table': " . ($exists ? "ADA" : "TIDAK ADA") . "\n";
+    }
+
+    echo "\n=== CEK USER ADMIN ===\n";
+    $result = $conn->query("SELECT username, created_at FROM users LIMIT 5");
+    if ($result && $result->num_rows > 0) {
+        while ($row = $result->fetch_assoc()) {
+            echo "User: " . $row['username'] . " | Dibuat: " . $row['created_at'] . "\n";
+        }
+    } else {
+        echo "Tabel users kosong - belum ada user!\n";
+    }
+
+} catch (mysqli_sql_exception $e) {
+    echo "KONEKSI GAGAL!\n";
+    echo "Error: " . $e->getMessage() . "\n";
+    echo "Host dicoba: " . DB_HOST . "\n";
+}