Mysql - Laravel 5.1 - 判断数据库连接

try 获取底层PDO实例.如果that失败，那么Laravel无法连接到数据库！

use Illuminate\Support\Facades\DB;

// Test database connection
try {
    DB::connection()->getPdo();
} catch (\Exception $e) {
    die("Could not connect to the database.  Please check your configuration. error:" . $e );
}