Laravel: App\Providers的声明\EventServiceProvider：：boot

Question

我目前正在更新到Laravel5.4，并在控制台中遇到了以下错误。

App\Providers\EventServiceProvider::boot(Illuminate\Contract声明 s\Events\Dispatcher $events)应该与Illuminate\Foundatio兼容 n\Support\Providers\EventServiceProvider::boot()

这是我的composer.json

{
"name": "laravel/laravel",
"description": "The Laravel Framework.",
"keywords": ["framework", "laravel"],
"license": "MIT",
"type": "project",
"require": {
    "php": ">=5.5.9",
    "laravel/framework": "5.4.*",
    "illuminate/html": "5.0.*",
    "laravelcollective/html": "^5.4.0"
},
"require-dev": {
    "fzaninotto/faker": "~1.4",
    "mockery/mockery": "0.9.*",
    "phpunit/phpunit": "~5.7",
    "symfony/css-selector": "2.8.*|3.0.*",
    "symfony/dom-crawler": "2.8.*|3.0.*"
},
"autoload": {
    "classmap": [
        "database"
    ],
    "psr-4": {
        "App\\": "app/"
    }
},
"autoload-dev": {
    "classmap": [
        "tests/TestCase.php"
    ]
},
"scripts": {
    "post-root-package-install": [
        "php -r \"copy('.env.example', '.env');\""
    ],
    "post-create-project-cmd": [
        "php artisan key:generate"
    ],
    "post-install-cmd": [
        "php artisan clear-compiled",
        "php artisan optimize"
    ],
    "pre-update-cmd": [
        "php artisan clear-compiled"
    ],
    "post-update-cmd": [
        "php artisan optimize"
    ]
},
"config": {
    "preferred-install": "dist"
}
}

Answer 1

您将更新到5.4，因此有些事情将发生变化。

引导方法不再需要传递给它的参数，父方法也不需要：

从函数和parent::boot()中完全删除参数，这样就不会向其中之一传递参数：

public function boot() 
{
    parent::boot();
}

Answer 2

我认为您的应用程序可能正在缓存已编译的文件，升级后为我提供的一个解决方案是重新创建一个新的空目录：

引导/缓存

将现有文件夹重命名为不同的临时名称，并创建一个新的目录引导/缓存，并应用权限/所有权，这样就可以了。