fix: add CI environment variable support to MariaDB config and workflow

- Update examples/config.mariadb.php to check for DB_* environment variables
  (matching MSSQL pattern) and use them if available, falling back to
  local development defaults
- Update GitHub Actions workflow to export DB_* variables for MariaDB examples
  (matching MSSQL pattern) to ensure examples use correct CI database settings
- This fixes MariaDB example failures where examples/config.mariadb.php was
  loaded with local values instead of CI values

Author: tommyknocker

.github/workflows/tests.yml

@@ -97,6 +97,11 @@ jobs:
       - name: Test MariaDB Examples
         run: |
           export PDODB_DRIVER=mariadb
+          export DB_USER="testuser"
+          export DB_PASS="testpass"
+          export DB_HOST="127.0.0.1"
+          export DB_PORT="3305"
+          export DB_NAME="testdb"
           ./scripts/test-examples.sh --verbose
       - name: Upload MariaDB coverage to Codecov
         uses: codecov/codecov-action@v4

examples/config.mariadb.php

@@ -1,8 +1,33 @@
 <?php
 /**
- * MySQL Database configuration for examples
+ * MariaDB Database configuration for examples
+ * 
+ * This config file checks for CI environment variables (DB_*) first,
+ * then falls back to local development defaults.
  */
 
+// Check for CI environment variables first
+$dbUser = getenv('DB_USER');
+$dbPass = getenv('DB_PASS');
+$dbHost = getenv('DB_HOST');
+$dbPort = getenv('DB_PORT');
+$dbName = getenv('DB_NAME');
+$dbCharset = getenv('DB_CHARSET');
+
+// If CI variables are set, use them
+if ($dbUser !== false && $dbPass !== false) {
+    return [
+        'driver' => 'mariadb',
+        'host' => $dbHost !== false ? $dbHost : '127.0.0.1',
+        'port' => $dbPort !== false ? (int)$dbPort : 3305,
+        'username' => $dbUser,
+        'password' => $dbPass,
+        'dbname' => $dbName !== false ? $dbName : 'testdb',
+        'charset' => $dbCharset !== false ? $dbCharset : 'utf8mb4',
+    ];
+}
+
+// Fallback to local development defaults
 return [
     'driver' => 'mariadb',
     'host' => '127.0.0.1',