Illuminate: ready. (critical)

- DB에서 illuminate를 가져올 수 있도록 설정
- 업그레이듵 불가, RootDB, DB를 직접 수정해야함

vendor/illuminate/database/PDO/Concerns/ConnectsToDatabase.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Illuminate\Database\PDO\Concerns;
+
+use Illuminate\Database\PDO\Connection;
+use InvalidArgumentException;
+use PDO;
+
+trait ConnectsToDatabase
+{
+    /**
+     * Create a new database connection.
+     *
+     * @param  array  $params
+     * @return \Illuminate\Database\PDO\Connection
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function connect(array $params)
+    {
+        if (! isset($params['pdo']) || ! $params['pdo'] instanceof PDO) {
+            throw new InvalidArgumentException('Laravel requires the "pdo" property to be set and be a PDO instance.');
+        }
+
+        return new Connection($params['pdo']);
+    }
+}