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

Question

我目前正在更新到 Laravel 5.4，并在控制台中遇到以下错误。

Declaration of App\Providers\EventServiceProvider::boot(Illuminate\Contract
s\Events\Dispatcher $events) should be compatible with Illuminate\Foundatio
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，因此有些事情将会发生变化。

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，这样就不会向其中任何一个传递参数:

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