diff --git a/fix_env.php b/fix_env.php
new file mode 100644
index 0000000..cf2202f
--- /dev/null
+++ b/fix_env.php
@@ -0,0 +1,69 @@
+<?php
+/**
+ * Server Environment Fixer & Probe
+ * This script helps diagnose and fix DB connection issues on the server.
+ */
+
+header('Content-Type: text/plain; charset=utf-8');
+
+echo "=== Server Environment Probe ===\n";
+echo "PHP Version: " . PHP_VERSION . "\n";
+echo "Current Directory: " . __DIR__ . "\n";
+echo "Hostname: " . gethostname() . "\n";
+
+$envPath = __DIR__ . '/.env';
+echo "Checking .env at: $envPath\n";
+
+if (file_exists($envPath)) {
+    echo ".env exists.\n";
+    $content = file_get_contents($envPath);
+    echo "--- .env Content (masked) ---\n";
+    foreach (explode("\n", $content) as $line) {
+        if (trim($line) === '') continue;
+        if (strpos($line, 'DB_PASS') !== false) {
+            echo "DB_PASS=********\n";
+        } else {
+            echo $line . "\n";
+        }
+    }
+} else {
+    echo ".env DOES NOT EXIST.\n";
+}
+
+echo "\n=== Database Connection Test ===\n";
+
+$hosts_to_test = ['localhost', '127.0.0.1', 'mysql'];
+$db_name = 'chandj';
+$db_user = 'root'; // Usually 'root' or matches system user
+$db_pass = 'root'; // Change as needed
+
+foreach ($hosts_to_test as $host) {
+    echo "Testing host [$host]... ";
+    try {
+        $dsn = "mysql:host=$host;dbname=$db_name;charset=utf8mb4";
+        $pdo = new PDO($dsn, $db_user, $db_pass, [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);
+        echo "SUCCESS!\n";
+        
+        if (isset($_GET['fix']) && $_GET['fix'] === 'true') {
+            echo "Updating .env to use host [$host]...\n";
+            $newEnv = "APP_URL=https://sales.sam.kr/\n";
+            $newEnv .= "DB_HOST=$host\n";
+            $newEnv .= "DB_NAME=$db_name\n";
+            $newEnv .= "DB_USER=$db_user\n";
+            $newEnv .= "DB_PASS=$db_pass\n";
+            $newEnv .= "DOCUMENT_ROOT=" . str_replace('\\', '/', __DIR__) . "\n";
+            
+            if (file_put_contents($envPath, $newEnv)) {
+                echo "Successfully wrote to .env\n";
+            } else {
+                echo "FAILED to write to .env. Check permissions.\n";
+            }
+        }
+        break; 
+    } catch (Exception $e) {
+        echo "FAILED: " . $e->getMessage() . "\n";
+    }
+}
+
+echo "\nUsage: Append ?fix=true to the URL to automatically create/update .env if a connection succeeds.\n";
+echo "SECURITY: DELETE THIS FILE AFTER USE!\n";