refactoring for dependency injection and testability.

laravel/database/connector/callback.php

@@ -0,0 +1,18 @@
+<?php namespace Laravel\DB\Connector;
+
+use Laravel\DB\Connector;
+
+class Callback extends Connector {
+
+	/**
+	 * Establish a PDO database connection.
+	 *
+	 * @param  array  $config
+	 * @return PDO
+	 */
+	public function connect($config)
+	{
+		return call_user_func($config['connector']);
+	}
+
+}