diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..f556f34
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,22 @@
+# Copy nilai ini ke environment Coolify sesuai resource/aplikasi yang dideploy.
+# XAMPP lokal tetap jalan tanpa file ini karena koneksi punya fallback localhost/root.
+
+# Umum untuk semua project PHP:
+DB_HOST=nama-service-database
+DB_USER=nama-user-database
+DB_PASSWORD=nama-password-database
+# DB_PASS juga didukung sebagai fallback jika platform memakai nama ini.
+# DB_PASS=nama-password-database
+
+# Pilih DB_NAME sesuai project:
+# Project 01 dan 04
+# DB_NAME=gis_spbu
+
+# Project 02 endpoint aktif memakai db.php
+# DB_NAME=data_jalan
+
+# Project 02 koneksi.php lama/sisa jika masih dipakai
+# DB_NAME=webgis
+
+# Project 05
+# DB_NAME=webgisuas
diff --git a/01/koneksi.php b/01/koneksi.php
index fc02754..3651e3b 100644
--- a/01/koneksi.php
+++ b/01/koneksi.php
@@ -1,8 +1,11 @@
 <?php
-$host = getenv('DB_HOST');
-$user = getenv('DB_USER');
+$host = getenv('DB_HOST') ?: 'localhost';
+$user = getenv('DB_USER') ?: 'root';
 $pass = getenv('DB_PASSWORD');
-$db   = getenv('DB_NAME');
+if ($pass === false || $pass === '') {
+    $pass = getenv('DB_PASS') ?: '';
+}
+$db = getenv('DB_NAME') ?: 'gis_spbu';
 
 $conn = mysqli_connect($host, $user, $pass, $db);
 
diff --git a/02/db.php b/02/db.php
index fc02754..76fdc14 100644
--- a/02/db.php
+++ b/02/db.php
@@ -1,8 +1,11 @@
 <?php
-$host = getenv('DB_HOST');
-$user = getenv('DB_USER');
+$host = getenv('DB_HOST') ?: 'localhost';
+$user = getenv('DB_USER') ?: 'root';
 $pass = getenv('DB_PASSWORD');
-$db   = getenv('DB_NAME');
+if ($pass === false || $pass === '') {
+    $pass = getenv('DB_PASS') ?: '';
+}
+$db = getenv('DB_NAME') ?: 'data_jalan';
 
 $conn = mysqli_connect($host, $user, $pass, $db);
 
diff --git a/02/koneksi.php b/02/koneksi.php
index fc02754..81864fe 100644
--- a/02/koneksi.php
+++ b/02/koneksi.php
@@ -1,8 +1,11 @@
 <?php
-$host = getenv('DB_HOST');
-$user = getenv('DB_USER');
+$host = getenv('DB_HOST') ?: 'localhost';
+$user = getenv('DB_USER') ?: 'root';
 $pass = getenv('DB_PASSWORD');
-$db   = getenv('DB_NAME');
+if ($pass === false || $pass === '') {
+    $pass = getenv('DB_PASS') ?: '';
+}
+$db = getenv('DB_NAME') ?: 'webgis';
 
 $conn = mysqli_connect($host, $user, $pass, $db);
 
diff --git a/04/koneksi.php b/04/koneksi.php
index fc02754..3651e3b 100644
--- a/04/koneksi.php
+++ b/04/koneksi.php
@@ -1,8 +1,11 @@
 <?php
-$host = getenv('DB_HOST');
-$user = getenv('DB_USER');
+$host = getenv('DB_HOST') ?: 'localhost';
+$user = getenv('DB_USER') ?: 'root';
 $pass = getenv('DB_PASSWORD');
-$db   = getenv('DB_NAME');
+if ($pass === false || $pass === '') {
+    $pass = getenv('DB_PASS') ?: '';
+}
+$db = getenv('DB_NAME') ?: 'gis_spbu';
 
 $conn = mysqli_connect($host, $user, $pass, $db);