Laravel 默认是支持多语言功能的, 我们可以快速实现
创建语种文件
config/app 中，应用默认语言是英文
php
/*
|--------------------------------------------------------------------------
| Application Locale Configuration
|--------------------------------------------------------------------------
|
| The application locale determines the default locale that will be used
| by the translation service provider. You are free to set this value
| to any of the locales which will be supported by the application.
|
*/
'locale' => 'en',resource/lang/ 是语言包目录，默认也只有英文 需要其他语种，可以到这个项目下载
假设我们这个项目需要实现荷兰语和英语 在resource/lang/下新建 nl 目录, 对应的文件也拷贝过来
最后为了灵活配置和扩展,新建config/locale.php 内容如下：
php
<?php
return [
/*
* Whether or not to show the language picker, or just default to the default
* locale specified in the app config file
*
* @var bool
*/
'status' => true,
/*
* Available languages
*
* Add your language code to this array.
* The code must have the same name as the language folder.
* Be sure to add the new language in an alphabetical order.
*
* The language picker will not be available if there is only one language option
* Commenting out languages will make them unavailable to the user
*
* @var array
*/
'languages' => [
/*
* Key is the Laravel locale code
* Index 0 of sub-array is the Carbon locale code
* Index 1 of sub-array is the PHP locale code for setlocale()
* Index 2 of sub-array is whether or not to use RTL (right-to-left) css for this language
*/
// 'ar' => ['ar', 'ar_AR', true],
// 'da' => ['da', 'da_DK', false],
// 'de' => ['de', 'de_DE', false],
// 'el' => ['el', 'el_GR', false],
'en' => ['en', 'en_US', false],
// 'es' => ['es', 'es_ES', false],
// 'fr' => ['fr', 'fr_FR', false],
// 'id' => ['id', 'id_ID', false],
// 'it' => ['it', 'it_IT', false],
'nl' => ['nl', 'nl_NL', false],
// 'pt_BR' => ['pt_BR', 'pt_BR', false],
// 'ru' => ['ru', 'ru-RU', false],
// 'sv' => ['sv', 'sv_SE', false],
// 'th' => ['th', 'th_TH', false],
],
];创建 resources/views/includes/lang.blade.php
php
<div class="dropdown-menu lang-menu">
@foreach (array_keys(config('locale.languages')) as $lang)
@if ($lang != App::getLocale())
<a class="dropdown-item" href="/lang/{{$lang}}">{{trans('menus.language-picker.langs.'.$lang)}}</a>
@endif
@endforeach
</div>从配置读所有语言，并只显示当前没有选中的语言，比如当前默认是en，配了两种语言en和nl。所以只显示nl
修改 resources/views/layouts/app.blade.php
php
<!-- Right Side Of Navbar -->
<ul class="navbar-nav ml-auto">
<li class="nav-item dropdown">
<a href="#" class="nav-link dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
{{ trans('menus.language-picker.language') }}
<span class="caret"></span>
</a>
@include('includes.lang')
</li>
@yield('navigation')
</ul>关于 trans('menus.language-picker.language') 需要新建 resouces/lang/en/menus 是整个系统菜单区域的语言翻译文件
php
<?php
return [
/*
|--------------------------------------------------------------------------
| Menus Language Lines
|--------------------------------------------------------------------------
|
| The following language lines are used in menu items throughout the system.
| Regardless where it is placed, a menu item can be listed here so it is easily
| found in a intuitive way.
|
*/
'Home' => 'Home',
'language-picker' => [
'language' => 'Language',
/*
* Add the new language to this array.
* The key should have the same language code as the folder name.
* The string should be: 'Language-name-in-your-own-language (Language-name-in-English)'.
* Be sure to add the new language in alphabetical order.
*/
'langs' => [
'ar' => 'Arabic',
'da' => 'Danish',
'de' => 'German',
'el' => 'Greek',
'en' => 'English',
'es' => 'Spanish',
'fr' => 'French',
'id' => 'Indonesian',
'it' => 'Italian',
'nl' => 'Dutch',
'pt_BR' => 'Brazilian Portuguese',
'ru' => 'Russian',
'sv' => 'Swedish',
'th' => 'Thai',
],
],
];前端效果如下：
后端
切换时需要请求api，然后把新的语言存到session中，还需要创建一个中间件，请求过来时候，判断下从session中读语言
首先routes/web.php中添加一个路由
// Switch between the included languages
Route::get('lang/{lang}', 'LanguageController@swap');然后创建LanguageController.php
php artisan make:controller LanguageController
php
<?php
namespace App\Http\Controllers;
/**
* Class LanguageController.
*/
class LanguageController extends Controller
{
/**
* @param $lang
*
* @return \Illuminate\Http\RedirectResponse
*/
public function swap($lang)
{
\App::setLocale($lang);
session()->put('locale', $lang);
return redirect()->back();
}
}接着创建中间件 php artisan make:middle Localization
php
<?php
namespace App\Http\Middleware;
use Illuminate\Foundation\Http\Middleware\TrimStrings as Middleware;
class Localization extends Middleware
{
public function handle($request, \Closure $next)
{
if (session()->has('locale')) {
\App::setLocale(session()->get('locale'));
}
return $next($request);
}
}别忘了为了让中间件生效，需要在app/Http/Kernel.php中加入相应的配置
php
/**
* The application's route middleware groups.
*
* @var array
*/
protected $middlewareGroups = [
'web' => [
\App\Http\Middleware\EncryptCookies::class,
\Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
\Illuminate\Session\Middleware\StartSession::class,
// \Illuminate\Session\Middleware\AuthenticateSession::class,
\Illuminate\View\Middleware\ShareErrorsFromSession::class,
\App\Http\Middleware\VerifyCsrfToken::class,
\Illuminate\Routing\Middleware\SubstituteBindings::class,
// 加到最下面
Localization::class,
],参考
https://www.larashout.com/how-to-create-multilingual-website-using-laravel-localization