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### 获取特定字段的所有错误消息

Source: https://learnku.com/docs/laravel/5.7/validation/1372

使用 get 方法获取指定字段的所有错误消息，支持使用 * 通配符处理数组字段。

```php
foreach ($errors->get('email') as $message) {
    //
}
```

```php
foreach ($errors->get('attachments.*') as $message) {
    //
}
```

--------------------------------

### 获取字段错误信息

Source: https://learnku.com/docs/laravel/5.7/validation

使用 first 方法获取特定字段的第一个错误，或使用 get 方法获取指定字段的所有错误数组。

```php
$errors = $validator->errors();

echo $errors->first('email');
```

```php
foreach ($errors->get('email') as $message) {
    //
}
```

```php
foreach ($errors->get('attachments.*') as $message) {
    //
}
```

--------------------------------

### Check String Start

Source: https://learnku.com/docs/laravel/5.7/helpers/2282?show_current_version=yes

Determines if a string starts with a specific value.

```php
$result = starts_with('This is my name', 'This');
```

--------------------------------

### 应用全局作用域到模型

Source: https://learnku.com/docs/laravel/5.7/eloquent/2294

在模型的 boot 方法中使用 addGlobalScope 方法注册全局作用域。

```php
<?php

namespace App;

use App\Scopes\AgeScope;
use Illuminate\Database\Eloquent\Model;

class User extends Model
{
    /**
     * 模型的「启动」方法
     *
     * @return void
     */
    protected static function boot()
    {
        parent::boot();

        static::addGlobalScope(new AgeScope);
    }
}
```

--------------------------------

### 发布扩展包视图

Source: https://learnku.com/docs/laravel/5.7/packages/2285

在 boot 方法中结合 loadViewsFrom 和 publishes 方法，允许用户发布视图到应用目录以进行重写。

```php
/**
 * 在注册后启动服务。
 *
 * @return void
 */
public function boot()
{
    $this->loadViewsFrom(__DIR__.'/path/to/views', 'courier');

    $this->publishes([
        __DIR__.'/path/to/views' => resource_path('views/vendor/courier'),
    ]);
}
```

--------------------------------

### str_start

Source: https://learnku.com/docs/laravel/5.7/helpers?cpo=7

Adds a given value to the start of a string if it does not already start with it.

```APIDOC
## str_start(string $value, string $prefix)

### Description
Adds the given value to the start of the string if it does not already start with the given value.

### Example
```php
$adjusted = str_start('this/string', '/'); // /this/string
$adjusted = str_start('/this/string', '/'); // /this/string
```
```

--------------------------------

### 发布扩展包配置文件

Source: https://learnku.com/docs/laravel/5.7/packages/2285

在服务提供者的 boot 方法中使用 publishes 方法，允许用户将扩展包的配置文件发布到应用的 config 目录。

```php
/**
 * 在注册后启动服务。
 *
 * @return void
 */
public function boot()
{
    $this->publishes([
        __DIR__.'/path/to/config/courier.php' => config_path('courier.php'),
    ]);
}
```

--------------------------------

### Install Algolia SDK

Source: https://learnku.com/docs/laravel/5.7/scout/2309

Install the required Algolia PHP SDK when using the Algolia driver.

```bash
composer require algolia/algoliasearch-client-php
```

--------------------------------

### 注册扩展包视图

Source: https://learnku.com/docs/laravel/5.7/packages/2285

在服务提供者的 boot 方法中使用 loadViewsFrom 方法注册视图路径。

```php
/**
 * 在注册后启动服务。
 *
 * @return void
 */
public function boot()
{
    $this->loadViewsFrom(__DIR__.'/path/to/views', 'courier');
}
```

--------------------------------

### Install Guzzle HTTP Library

Source: https://learnku.com/docs/laravel/5.7/mail/2283?show_current_version=yes

Install the Guzzle HTTP library via Composer, which is required for API-based mail drivers.

```bash
composer require guzzlehttp/guzzle
```

--------------------------------

### Perform a basic HTTP GET request test

Source: https://learnku.com/docs/laravel/5.7/http-tests/2301

Demonstrates a simple feature test that performs a GET request and asserts the HTTP status code.

```php
<?php

namespace Tests\Feature;

use Tests\TestCase;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;

class ExampleTest extends TestCase
{
    /**
     * 一个基础的测试用例
     *
     * @return void
     */
    public function testBasicTest()
    {
        $response = $this->get('/');

        $response->assertStatus(200);
    }
}
```

--------------------------------

### 监听查询事件

Source: https://learnku.com/docs/laravel/5.7/eloquent/2288?show_current_version=yes

在服务提供器的 boot 方法中使用 DB::listen 注册查询监听器，用于记录或调试。

```php
<?php

namespace App\Providers;

use Illuminate\Support\Facades\DB;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    /**
     * 启动运用服务
     *
     * @return void
     */
    public function boot()
    {
        DB::listen(function ($query) {
            // $query->sql
            // $query->bindings
            // $query->time
        });
    }

    /**
     * 注册服务提供器
     *
     * @return void
     */
    public function register()
    {
        //
    }
}
```

--------------------------------

### Implement the Boot Method

Source: https://learnku.com/docs/laravel/5.7/providers

Use the boot method to perform actions that require all other services to be registered, such as registering view composers.

```php
<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;

class ComposerServiceProvider extends ServiceProvider
{
    /**
     * 启动所有的应用服务
     *
     * @return void
     */
    public function boot()
    {
        view()->composer('view', function () {
            //
        });
    }
}
```

--------------------------------

### 从缓存中获取数据

Source: https://learnku.com/docs/laravel/5.7/cache/2278

使用 get 方法获取数据，支持设置默认值或通过闭包获取默认值。

```php
$value = Cache::get('key');

$value = Cache::get('key', 'default');
```

```php
$value = Cache::get('key', function () {
    return DB::table(...)->get();
});
```

--------------------------------

### 注册观察者

Source: https://learnku.com/docs/laravel/5.7/eloquent/2294?show_current_version=yes

在服务提供者的 boot 方法中使用 observe 方法注册观察者。

```php
<?php

namespace App\Providers;

use App\User;
use App\Observers\UserObserver;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    /**
     * 运行所有应用服务.
     *
     * @return void
     */
    public function boot()
    {
        User::observe(UserObserver::class);
    }

    /**
     * 注册服务提供.
     *
     * @return void
     */
    public function register()
    {
        //
    }
}
```

--------------------------------

### get()

Source: https://learnku.com/docs/laravel/5.7/collections

Returns the item at a given key.

```APIDOC
## get(string $key, mixed $default = null)

### Description
Returns the item at a given key. If the key does not exist, null or the provided default value is returned.

### Example
```php
$value = $collection->get('name');
$value = $collection->get('foo', 'default-value');
```
```

--------------------------------

### 在服务提供商中注册视图合成器

Source: https://learnku.com/docs/laravel/5.7/views/2259?show_current_version=yes

在服务提供商的 boot 方法中使用 View Facade 注册基于类或闭包的视图合成器。

```php
<?php

namespace App\Providers;

use Illuminate\Support\Facades\View;
use Illuminate\Support\ServiceProvider;

class ComposerServiceProvider extends ServiceProvider
{
    /**
     * 在容器中注册绑定。
     *
     * @return void
     */
    public function boot()
    {
        // 使用基于类的 composer...
        View::composer(
            'profile', 'App\Http\ViewComposers\ProfileComposer'
        );

        // 使用基于闭包的 composers...
        View::composer('dashboard', function ($view) {
            //
        });
    }

    /**
     * 注册服务器提供者。
     *
     * @return void
     */
    public function register()
    {
        //
    }
}
```

--------------------------------

### GET /oauth/scopes

Source: https://learnku.com/docs/laravel/5.7/passport/2270?show_current_version=yes

Retrieves all scopes defined in the application.

```APIDOC
## GET /oauth/scopes

### Description
Returns all scopes defined in the application that can be assigned to personal access tokens.

### Method
GET

### Endpoint
/oauth/scopes
```

--------------------------------

### 初始化 Homestead 配置文件

Source: https://learnku.com/docs/laravel/5.7/homestead/2245

在 Homestead 目录中运行初始化脚本以创建 Homestead.yaml 配置文件。

```bash
// Mac / Linux...
bash init.sh

// Windows...
init.bat
```

--------------------------------

### 加载扩展包路由

Source: https://learnku.com/docs/laravel/5.7/packages/2285

在服务提供者的 boot 方法中使用 loadRoutesFrom 方法加载路由文件，该方法会自动处理路由缓存。

```php
/**
 * 在注册后启动服务。
 *
 * @return void
 */
public function boot()
{
    $this->loadRoutesFrom(__DIR__.'/routes.php');
}
```

--------------------------------

### 获取所有 OAuth2 客户端

Source: https://learnku.com/docs/laravel/5.7/passport/2270

通过 GET 请求获取当前认证用户的所有客户端列表。

```javascript
axios.get('/oauth/clients')
    .then(response => {
        console.log(response.data);
    });
```

--------------------------------

### 禁用资源包裹

Source: https://learnku.com/docs/laravel/5.7/eloquent-resources/2298

在服务提供者的 boot 方法中调用 withoutWrapping 方法以移除顶层 data 键。

```php
<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Illuminate\Http\Resources\Json\Resource;

class AppServiceProvider extends ServiceProvider
{
    /**
     * 在注册后进行服务的启动。
     *
     * @return void
     */
    public function boot()
    {
        Resource::withoutWrapping();
    }

    /**
     * 在容器中注册绑定。
     *
     * @return void
     */
    public function register()
    {
        //
    }
}
```

--------------------------------

### session()

Source: https://learnku.com/docs/laravel/5.7/helpers/2282

Used to get or set session values.

```APIDOC
## session()

### Description
Used to get or set session values. If no arguments are passed, it returns the session store instance.
```

--------------------------------

### 配置默认分页视图

Source: https://learnku.com/docs/laravel/5.7/pagination/2290?show_current_version=yes

在 AppServiceProvider 的 boot 方法中设置全局默认的分页视图。

```php
use Illuminate\Pagination\Paginator;

public function boot()
{
    Paginator::defaultView('pagination::view');

    Paginator::defaultSimpleView('pagination::view');
}
```

--------------------------------

### slice()

Source: https://learnku.com/docs/laravel/5.7/collections

Returns a slice of the collection starting at the given index.

```APIDOC
## slice(int $offset, int|null $length = null)

### Description
The `slice` method returns a slice of the collection starting at the given index.
```

--------------------------------

### 在服务提供者中注册 Artisan 命令

Source: https://learnku.com/docs/laravel/5.7/packages/2285?show_current_version=yes

在服务提供者的 boot 方法中使用 commands 方法注册命令类，并确保仅在控制台环境下运行。

```php
/**
 * 引导应用服务。
 *
 * @return void
 */
public function boot()
{
    if ($this->app->runningInConsole()) {
        $this->commands([
            FooCommand::class,
            BarCommand::class,
        ]);
    }
}
```

--------------------------------

### 注册自定义文件系统驱动

Source: https://learnku.com/docs/laravel/5.7/filesystem?cpo=7

在服务提供者的 boot 方法中使用 Storage::extend 注册自定义驱动。

```php
<?php

namespace App\Providers;

use Storage;
use League\Flysystem\Filesystem;
use Illuminate\Support\ServiceProvider;
use Spatie\Dropbox\Client as DropboxClient;
use Spatie\FlysystemDropbox\DropboxAdapter;

class DropboxServiceProvider extends ServiceProvider
{
    /**
     * 执行注册后引导服务
     *
     * @return void
     */
    public function boot()
    {
        Storage::extend('dropbox', function ($app, $config) {
            $client = new DropboxClient(
                $config['authorization_token']
            );

            return new Filesystem(new DropboxAdapter($client));
        });
    }

    /**
     * 在容器中注册绑定
     *
     * @return void
     */
    public function register()
    {
        //
    }
}
```

--------------------------------

### Get String Before

Source: https://learnku.com/docs/laravel/5.7/helpers/2282?show_current_version=yes

Returns the portion of a string before a given value.

```php
$slice = str_before('This is my name', 'my name');
```

--------------------------------

### Get String After

Source: https://learnku.com/docs/laravel/5.7/helpers/2282?show_current_version=yes

Returns the portion of a string after a given value.

```php
$slice = str_after('This is my name', 'This is');
```

--------------------------------

### 访问已发布的配置

Source: https://learnku.com/docs/laravel/5.7/packages/2285

配置文件发布后，可以使用标准的 config 辅助函数进行访问。

```php
$value = config('courier.option');
```

--------------------------------

### 创建公共磁盘符号链接

Source: https://learnku.com/docs/laravel/5.7/filesystem?cpo=7

使用 Artisan 命令创建 storage/public 到 storage/app/public 的符号链接，以便通过网络访问文件。

```bash
php artisan storage:link
```

--------------------------------

### Slice the collection

Source: https://learnku.com/docs/laravel/5.7/collections/2279?show_current_version=yes

Returns a slice of the collection starting at the given index.

```php
$collection = collect([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);

$slice = $collection->slice(4);

$slice->all();

// [5, 6, 7, 8, 9, 10]
```

```php
$slice = $collection->slice(4, 2);

$slice->all();

// [5, 6]
```

--------------------------------

### 配置全局 Homestead 命令 (Mac/Linux)

Source: https://learnku.com/docs/laravel/5.7/homestead

在 Bash 配置文件中添加函数，以便在任意路径运行 Homestead 命令。

```bash
function homestead() {
    ( cd ~/Homestead && vagrant $* )
}
```

--------------------------------

### 执行基础模型搜索

Source: https://learnku.com/docs/laravel/5.7/scout/2309

使用 search 方法配合 get 方法检索匹配的 Eloquent 模型。

```php
$orders = App\Order::search('Star Trek')->get();
```

--------------------------------

### GET /oauth/clients

Source: https://learnku.com/docs/laravel/5.7/passport/2270

Retrieves all OAuth2 clients belonging to the authenticated user.

```APIDOC
## GET /oauth/clients

### Description
Returns a list of all clients owned by the authenticated user.

### Method
GET

### Endpoint
/oauth/clients
```

--------------------------------

### 加载数据库迁移

Source: https://learnku.com/docs/laravel/5.7/packages/2285

在服务提供者的 boot 方法中使用 loadMigrationsFrom 方法注册扩展包的数据库迁移文件。

```php
/**
 * 在注册后启动服务。
 *
 * @return void
 */
public function boot()
{
    $this->loadMigrationsFrom(__DIR__.'/path/to/migrations');
}
```

--------------------------------

### Get Class Basename

Source: https://learnku.com/docs/laravel/5.7/helpers/2282?show_current_version=yes

Returns the class name without the namespace.

```php
$class = class_basename('Foo\Bar\Baz');
```

--------------------------------

### 注册自定义 Session 驱动

Source: https://learnku.com/docs/laravel/5.7/session

在服务提供者的 boot 方法中使用 Session::extend 方法注册自定义驱动。注册完成后，即可在 config/session.php 配置文件中使用该驱动名称。

```php
<?php

namespace App\Providers;

use App\Extensions\MongoSessionHandler;
use Illuminate\Support\Facades\Session;
use Illuminate\Support\ServiceProvider;

class SessionServiceProvider extends ServiceProvider
{
    /**
     * 执行服务的注册后启动
     *
     * @return void
     */
    public function boot()
    {
        Session::extend('mongo', function ($app) {
            // 返回实现 SessionHandlerInterface 的对象
            return new MongoSessionHandler;
        });
    }

    /**
     * 在容器中注册绑定关系
     *
     * @return void
     */
    public function register()
    {
        //
    }
}
```

--------------------------------

### 更新 Homestead 环境

Source: https://learnku.com/docs/laravel/5.7/homestead

更新 Vagrant box 和 Homestead 源代码的命令。

```bash
vagrant box update
```

```bash
composer update
```

--------------------------------

### Get Mix Path

Source: https://learnku.com/docs/laravel/5.7/helpers/2282?show_current_version=yes

Returns the path to a versioned Mix file.

```php
$path = mix('css/app.css');
```

--------------------------------

### Add prefix to string

Source: https://learnku.com/docs/laravel/5.7/helpers?cpo=7

Prepends a value to a string if it does not already start with that value.

```php
$adjusted = str_start('this/string', '/');

// /this/string

$adjusted = str_start('/this/string', '/');

// /this/string
```

--------------------------------

### 注册响应宏

Source: https://learnku.com/docs/laravel/5.7/responses/2258

在服务提供器的 boot 方法中使用 Response::macro 定义自定义响应逻辑。

```php
<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Facades\Response;

class ResponseMacroServiceProvider extends ServiceProvider
{
    /**
     * 注册应用程序的响应宏
     *
     * @return void
     */
    public function boot()
    {
        Response::macro('caps', function ($value) {
            return Response::make(strtoupper($value));
        });
    }
}
```

--------------------------------

### Install Laravel Socialite

Source: https://learnku.com/docs/laravel/5.7/socialite/2310

Use Composer to add the package to your project dependencies.

```bash
composer require laravel/socialite
```

--------------------------------

### Accessing a Facade

Source: https://learnku.com/docs/laravel/5.7/facades

Demonstrates importing and using a Facade within a route definition.

```php
use Illuminate\
Support\\Facades\\Cache;\n\nRoute::get('/cache', function () {\n    return Cache::get('key');\n});
```

--------------------------------

### GET /oauth/personal-access-tokens

Source: https://learnku.com/docs/laravel/5.7/passport/2270?show_current_version=yes

Retrieves all personal access tokens created by the authenticated user.

```APIDOC
## GET /oauth/personal-access-tokens

### Description
Returns all personal access tokens created by the authenticated user.

### Method
GET

### Endpoint
/oauth/personal-access-tokens
```

--------------------------------

### 配置全局 Homestead 命令 (Windows)

Source: https://learnku.com/docs/laravel/5.7/homestead

创建一个批处理文件并将其添加到 PATH，以支持在任意位置运行 Vagrant 命令。

```batch
@echo off

set cwd=%cd%
set homesteadVagrant=C:\Homestead

cd /d %homesteadVagrant% && vagrant %*
cd /d %cwd%

set cwd=
set homesteadVagrant=
```

--------------------------------

### Comparing Facades and Helper Functions

Source: https://learnku.com/docs/laravel/5.7/facades/2251?show_current_version=yes

Illustrates that Facades and helper functions often provide identical functionality.

```php
return View::make('profile');

return view('profile');
```

--------------------------------

### Retrieve all input data

Source: https://learnku.com/docs/laravel/5.7/requests/2257?show_current_version=yes

Use the all method to get all input data as an array.

```php
$input = $request->all();
```

--------------------------------

### 获取数据表所有行

Source: https://learnku.com/docs/laravel/5.7/queries/2289

使用 DB facade 的 table 方法获取查询构造器实例，并通过 get 方法检索所有记录。

```php
<?php

namespace App\Http\Controllers;

use Illuminate\Support\Facades\DB;
use App\Http\Controllers\Controller;

class UserController extends Controller
{
    /**
     * 显示所有应用程序的用户列表。
     *
     * @return Response
     */
    public function index()
    {
        $users = DB::table('users')->get();

        return view('user.index', ['users' => $users]);
    }
}
```

```php
foreach ($users as $user) {
    echo $user->name;
}
```

--------------------------------

### 在服务提供者中注册驱动

Source: https://learnku.com/docs/laravel/5.7/cache/2278

在 AppServiceProvider 或自定义服务提供者的 boot 方法中注册驱动。

```php
<?php

namespace App\Providers;

use App\Extensions\MongoStore;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\ServiceProvider;

class CacheServiceProvider extends ServiceProvider
{
    /**
     * 执行服务的注册后引导。
     *
     * @return void
     */
    public function boot()
    {
        Cache::extend('mongo', function ($app) {
            return Cache::repository(new MongoStore);
        });
    }

    /**
     * 在容器中注册绑定。
     *
     * @return void
     */
    public function register()
    {
        //
    }
}
```

--------------------------------

### Get last element with last

Source: https://learnku.com/docs/laravel/5.7/helpers/2282?show_current_version=yes

Returns the last element of the provided array.

```php
$array = [100, 200, 300];

$last = last($array);

// 300
```

--------------------------------

### 安装软件包时避免覆盖配置

Source: https://learnku.com/docs/laravel/5.7/homestead/2245

在 after.sh 脚本中安装软件包时使用此命令，以防止 Ubuntu 覆盖现有的 Homestead 配置。

```bash
sudo apt-get -y \
    -o Dpkg::Options::="--force-confdef" \
    -o Dpkg::Options::="--force-confold" \
    install your-package
```

--------------------------------

### Get first element with head

Source: https://learnku.com/docs/laravel/5.7/helpers/2282?show_current_version=yes

Returns the first element of the provided array.

```php
$array = [100, 200, 300];

$first = head($array);

// 100
```

--------------------------------

### 在 config/app.php 中注册服务提供者

Source: https://learnku.com/docs/laravel/5.7/providers

将自定义的服务提供者类添加到 providers 数组中以完成注册。

```php
'providers' => [
    // 其他服务提供者

    App\Providers\ComposerServiceProvider::class,
],
```

--------------------------------

### 检索环境配置值

Source: https://learnku.com/docs/laravel/5.7/configuration/2243?show_current_version=yes

使用 env 函数从 .env 文件中获取配置，第二个参数为默认值。

```php
'debug' => env('APP_DEBUG', false),
```

--------------------------------

### Get current time with now()

Source: https://learnku.com/docs/laravel/5.7/helpers?cpo=7

Creates a new Illuminate\Support\Carbon instance for the current time.

```php
$now = now();
```

--------------------------------

### Retrieve Environment Variables

Source: https://learnku.com/docs/laravel/5.7/helpers?cpo=7

Gets the value of an environment variable or returns a default.

```php
$env = env('APP_ENV');

// Returns 'production' if APP_ENV is not set...
$env = env('APP_ENV', 'production');
```

--------------------------------

### 使用实时 Facade 发布 Podcast

Source: https://learnku.com/docs/laravel/5.7/facades/2251?show_current_version=yes

通过在导入路径前添加 Facades 前缀，将 Publisher 接口作为实时 Facade 使用，无需显式注入。

```php
<?php

namespace App;

use Facades\App\Contracts\Publisher;
use Illuminate\Database\Eloquent\Model;

class Podcast extends Model
{
    /**
     * 发布 Podcast。
     *
     * @return void
     */
    public function publish()
    {
        $this->update(['publishing' => now()]);

        Publisher::publish($this);
    }
}
```

--------------------------------

### 注册自定义 Scout 引擎

Source: https://learnku.com/docs/laravel/5.7/scout/2309

在服务提供器的 boot 方法中使用 EngineManager 的 extend 方法注册自定义引擎。

```php
use Laravel\Scout\EngineManager;

/**
 * 启动任何的服务。
 *
 * @return void
 */
public function boot()
{
    resolve(EngineManager::class)->extend('mysql', function () {
        return new MySqlSearchEngine;
    });
}
```

--------------------------------

### get()

Source: https://learnku.com/docs/laravel/5.7/collections/2279?show_current_version=yes

Returns the item at a given key, or a default value if the key does not exist.

```APIDOC
## get(string $key, mixed $default = null)

### Description
Returns the item at a given key. If the key does not exist, the default value (or result of a callback) is returned.
```

--------------------------------

### Manage Horizon Processes

Source: https://learnku.com/docs/laravel/5.7/horizon/2308?show_current_version=yes

Commands to start, pause, continue, or terminate the Horizon process.

```bash
php artisan horizon
```

```bash
php artisan horizon:pause
php artisan horizon:continue
```

```bash
php artisan horizon:terminate
```

--------------------------------

### 定义全局路由模式

Source: https://learnku.com/docs/laravel/5.7/routing/2253?show_current_version=yes

在 RouteServiceProvider 的 boot 方法中使用 pattern 定义全局约束。

```php
/**
 * 定义你的路由模型绑定, pattern 过滤器等。
 *
 * @return void
 */
public function boot()
{
    Route::pattern('id', '[0-9]+');

    parent::boot();
}
```

```php
Route::get('user/{id}', function ($id) {
    // 只有在 id 为数字时才执行。
});
```

--------------------------------

### 发布语言包文件

Source: https://learnku.com/docs/laravel/5.7/packages/2285

在 boot 方法中结合 loadTranslationsFrom 和 publishes 方法，允许用户发布语言包到应用目录。

```php
/**
 * 在注册后启动服务。
 *
 * @return void
 */
public function boot()
{
    $this->loadTranslationsFrom(__DIR__.'/path/to/translations', 'courier');

    $this->publishes([
        __DIR__.'/path/to/translations' => resource_path('lang/vendor/courier'),
    ]);
}
```

--------------------------------

### Install Laravel Scout

Source: https://learnku.com/docs/laravel/5.7/scout/2309

Use Composer to add the Scout package to your Laravel project.

```bash
composer require laravel/scout
```

--------------------------------

### Install Laravel Horizon

Source: https://learnku.com/docs/laravel/5.7/horizon/2308

Use Composer to add the Horizon package to your Laravel project.

```bash
composer require laravel/horizon
```

--------------------------------

### 使用 Hash::make 加密密码

Source: https://learnku.com/docs/laravel/5.7/hashing/2274

在控制器中通过 Hash facade 的 make 方法对用户密码进行加密处理。

```php
<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Hash;
use App\Http\Controllers\Controller;

class UpdatePasswordController extends Controller
{
    /**
     * 更新用户密码。
     *
     * @param  Request  $request
     * @return Response
     */
    public function update(Request $request)
    {
        // 验证新的密码长度

        $request->user()->fill([
            'password' => Hash::make($request->newPassword)
        ])->save();
    }
}
```

--------------------------------

### 切换至 React 脚手架

Source: https://learnku.com/docs/laravel/5.7/frontend/2267?show_current_version=yes

使用 preset 命令将默认的 Vue 脚手架替换为 React。

```bash
php artisan preset react
```

--------------------------------

### Get current date with today()

Source: https://learnku.com/docs/laravel/5.7/helpers?cpo=7

Creates a new Illuminate\Support\Carbon instance for the current date.

```php
$today = today();
```

--------------------------------

### 删除并重新运行迁移

Source: https://learnku.com/docs/laravel/5.7/migrations

使用 migrate:fresh 命令删除所有表并重新执行迁移。

```bash
php artisan migrate:fresh

php artisan migrate:fresh --seed
```

--------------------------------

### Get array elements with head and last

Source: https://learnku.com/docs/laravel/5.7/helpers?cpo=7

Retrieves the first or last element of an array.

```php
$array = [100, 200, 300];

$first = head($array);

// 100
```

```php
$array = [100, 200, 300];

$last = last($array);

// 300
```

--------------------------------

### 执行资源发布命令

Source: https://learnku.com/docs/laravel/5.7/packages/2285?show_current_version=yes

使用 Artisan 命令发布指定标签的资源，并可通过 --force 标签覆盖现有文件。

```bash
php artisan vendor:publish --tag=public --force
```

--------------------------------

### Get Mode Value

Source: https://learnku.com/docs/laravel/5.7/collections/2279?show_current_version=yes

The mode method returns the mode value for a given key.

```php
$mode = collect([['foo' => 10], ['foo' => 10], ['foo' => 20], ['foo' => 40]])->mode('foo');

// [10]

$mode = collect([1, 1, 2, 4])->mode();

// [1]
```

--------------------------------

### 运行任务命令

Source: https://learnku.com/docs/laravel/5.7/envoy/2307

通过 run 命令触发任务。

```bash
envoy run task
```

--------------------------------

### Get Minimum Value

Source: https://learnku.com/docs/laravel/5.7/collections/2279?show_current_version=yes

The min method returns the minimum value for a given key.

```php
$min = collect([['foo' => 10], ['foo' => 20]])->min('foo');

// 10

$min = collect([1, 2, 3, 4, 5])->min();

// 1
```
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