i want to install laravel/horizon but it give error laravel v9

Question

i write composer require laravel/horizon to composer but it give this error :

Your requirements could not be resolved to an installable set of packages.

Problem 1 - Root composer.json requires laravel/horizon ^0.1.0 -> satisfiable by laravel/horizon[v0.1.0]. - laravel/horizon v0.1.0 requires illuminate/contracts ~5.4 -> found illuminate/contracts[v5.4.0, ..., 5.8.x-dev] but these were not loaded, likely because it conflicts with another require.

You can also try re-running composer require with an explicit version constraint, eg "composer require laravel/horizon:*" to figure out if any version is installable, or "composer require laravel/horizon:^2.1" if you know which you need.

Installation failed, reverting ./composer.json and ./composer.lock to their original content.

my composer.json :

    "name": "laravel/laravel",
    "type": "project",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "require": {
        "php": "^8.0.2",
        "guzzlehttp/guzzle": "^7.2",
        "laravel/framework": "^9.11",
        "laravel/sanctum": "^2.14.1",
        "laravel/tinker": "^2.7"
    },
    "require-dev": {
        "fakerphp/faker": "^1.9.1",
        "laravel/sail": "^1.0.1",
        "mockery/mockery": "^1.4.4",
        "nunomaduro/collision": "^6.1",
        "phpunit/phpunit": "^9.5.10",
        "spatie/laravel-ignition": "^1.0"
    },
    "autoload": {
        "psr-4": {
            "App\\": "app/",
            "Database\\Factories\\": "database/factories/",
            "Database\\Seeders\\": "database/seeders/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\\": "tests/"
        }
    },
    "scripts": {
        "post-autoload-dump": [
            "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
            "@php artisan package:discover --ansi"
        ],
        "post-update-cmd": [
            "@php artisan vendor:publish --tag=laravel-assets --ansi --force"
        ],
        "post-root-package-install": [
            "@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "@php artisan key:generate --ansi"
        ]
    },
    "extra": {
        "laravel": {
            "dont-discover": []
        }
    },
    "config": {
        "optimize-autoloader": true,
        "preferred-install": "dist",
        "sort-packages": true
    },
    "minimum-stability": "dev",
    "prefer-stable": true
}

Answer 1

我用这段代码解决了这个问题：composer require laravel/horizo​​n:^v5.9.7 --ignore-platform-req=ext-pcntl --ignore-platform-req=ext-posix