查看“系统服务”的源代码

==事件==

Laravel事件提供了简单的侦听器实现，允许你订阅和监听事件，事件类通常被保存在app/Events目录下，而它们的侦听器被保存在app/Listeners目录下。

==错误与日志==

<source lang='php'>
//.env
APP_DEBUG=true

// bootstrap/app.php
$app->withFacades();

//引用Log
use Log;

// 8个日志级别
Log::emergency($error);
Log::alert($error);
Log::critical($error);
Log::error($error);
Log::warning($error);
Log::notice($error);
Log::info($error);
Log::debug($error);
</source>

==测试==

<source lang='php'>
public function testTom()
{
    $response = $this->call('get', '/userInfo');
    $result = json_decode($response->original);

    $this->assertEquals(
        'Tom', $result->name
    );
}
</source>

==缓存==

<source lang='php'>
use Cache;

if (Cache::has('key')) {
    $coupon_total = Cache::get('key');
} else {
    $rs = Coupon_api::instance()->total();

    if ($rs['status']) {
        $coupon_total = $rs['data']['total_amount'];
    }

    Cache::put('key', $coupon_total, 5); //5 minutes
}
</source>

==session==
;session使用
<source lang='php'>
use Illuminate\Http\Request;

function blade(Request $request)
{
    //赋值
    session(['name'=> 'Tom']);
    $request->session()->put('name', 'Tom');
    $request->session()->push('students', 'Tom');
 
    //取值
    $name = session('name');
    $request->session()->get('students');
}
</source>


;Session store not set on request.
<source lang='php'>
// Kernel.php添加中间件
protected $middleware = [
    //...
    \Illuminate\Session\Middleware\StartSession::class,
    \Illuminate\View\Middleware\ShareErrorsFromSession::class,
];
</source>

==表单验证==