Laravel 5.2 oracle database PDOException

我正在xamp上工作，使用laravel 5.2并试图连接oracle数据库这里我想在tinker中获取值:

DB::table('dept')->get();

出现错误:

PDOException with message 'could not find driver'

my .env file

DB_CONNECTION=sqlsrv
DB_HOST=localhost
DB_PORT=1521
DB_DATABASE=Mydb
DB_USERNAME=db_username
DB_PASSWORD=password

我database.php

'default' => env('DB_CONNECTION', 'sqlsrv'),

…

    'sqlsrv' => [
        'driver' => 'sqlsrv',
        'host' => env('DB_HOST', 'localhost'),
        'database' => env('DB_DATABASE', 'Mydb'),
        'username' => env('DB_USERNAME', 'db_username'),
        'password' => env('DB_PASSWORD', 'password'),
        'charset' => 'utf8',
        'prefix' => '',
    ],

安装Oracle客户端:http://www.oracle.com/technetwork/database/features/instant-client/index-097480.html

安装/启用Oracle for PHP。这取决于你的操作系统。在windows中，我相信您只需要在php.ini上启用extension=pdo_oci.dll。在linux中，您需要在您的发行版中安装apt get或类似的工具，或者按照以下页面的说明重新编译PHP: http://php.net/manual/en/ref.pdo-oci.php

在你的Laravel项目中使用这个库:https://github.com/yajra/laravel-oci8

In config/database.php:

'default' => env('DB_CONNECTION', 'my_connection'),
'connections' => [
    'my_connection' => [
        'driver'   => 'oracle',
        'host'     => env('DB_HOST', 'localhost'),
        'port'     => env('DB_PORT', '1521'),
        'service_name' => env('DB_SERVICE_NAME', ''),
        'database' => env('DB_DATABASE', ''),
        'username' => env('DB_USERNAME', ''),
        'password' => env('DB_PASSWORD', ''),
        'charset'  => 'utf8',
        'prefix'   => '',
        'options' => [
            PDO::ATTR_PERSISTENT => true
        ],
    ],

在你的.env:

DB_CONNECTION=my_connection
DB_HOST=111.111.111.111
DB_SERVICE_NAME=service
DB_DATABASE=db
DB_USERNAME=user
DB_PASSWORD=pass