安装glodemans / shoppingcart所需的照明/事件后，可进行进一步操作。
要求为illuminate/support: 5.1.*，illuminate/session: 5.1.*，illuminate/events: 5.1.*。我也安装了此依赖项，但无法从^7.17降级到5.1
作曲者更新：
Your requirements could not be resolved to an installable set of packages.
Problem 1
- The requested package illuminate/events 5.1.0 exists as illuminate/events[4.0.x-dev, 4.1.x-dev, 4.2.x-dev, 5.0.x-dev, 5.1.x-dev, 5.2.x-dev, 5.3.x-dev, 5.4.x-dev, 5.5.x-dev, 5.6.x-dev, 5.7.17, 5.7.18, 5.7.19, 5.7.x-dev, 5.8.x-dev, 6.x-dev, 7.x-dev, dev-master, 8.x-dev, v1.0.0, v1.1.0, v4.0.0, v4.0.0-BETA2, v4.0.0-BETA3, v4.0.0-BETA4, v4.0.1, v4.0.10, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7, v4.0.8, v4.0.9, v4.1.0, v4.1.1, v4.1.10, v4.1.11, v4.1.12, v4.1.13, v4.1.14, v4.1.15, v4.1.16, v4.1.17, v4.1.18, v4.1.19, v4.1.2, v4.1.20, v4.1.21, v4.1.22, v4.1.23, v4.1.24, v4.1.25, v4.1.26, v4.1.27, v4.1.28, v4.1.29, v4.1.3, v4.1.30, v4.1.4, v4.1.5, v4.1.6, v4.1.7, v4.1.8, v4.1.9, v4.2.0-BETA1, v4.2.1, v4.2.12, v4.2.16, v4.2.17, v4.2.2, v4.2.3, v4.2.4, v4.2.5, v4.2.6, v4.2.7, v4.2.8, v4.2.9, v5.0.0, v5.0.22, v5.0.25, v5.0.26, v5.0.28, v5.0.33, v5.0.4, v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41, v5.1.6, v5.1.8, v5.2.0, v5.2.19, v5.2.21, v5.2.24, v5.2.25, v5.2.26, v5.2.27, v5.2.28, v5.2.31, v5.2.32, v5.2.37, v5.2.43, v5.2.45, v5.2.6, v5.2.7, v5.3.0, v5.3.16, v5.3.23, v5.3.4, v5.4.0, v5.4.13, v5.4.17, v5.4.19, v5.4.27, v5.4.36, v5.4.9, v5.5.0, v5.5.16, v5.5.17, v5.5.2, v5.5.28, v5.5.33, v5.5.34, v5.5.35, v5.5.36, v5.5.37, v5.5.39, v5.5.40, v5.5.41, v5.5.43, v5.5.44, v5.6.0, v5.6.1, v5.6.10, v5.6.11, v5.6.12, v5.6.13, v5.6.14, v5.6.15, v5.6.16, v5.6.17, v5.6.19, v5.6.2, v5.6.20, v5.6.21, v5.6.22, v5.6.23, v5.6.24, v5.6.25, v5.6.26, v5.6.27, v5.6.28, v5.6.29, v5.6.3, v5.6.30, v5.6.31, v5.6.32, v5.6.33, v5.6.34, v5.6.35, v5.6.36, v5.6.37, v5.6.38, v5.6.39, v5.6.4, v5.6.5, v5.6.6, v5.6.7, v5.6.8, v5.6.9, v5.7.0, v5.7.1, v5.7.10, v5.7.11, v5.7.15, v5.7.2, v5.7.20, v5.7.21, v5.7.22, v5.7.23, v5.7.26, v5.7.27, v5.7.28, v5.7.3, v5.7.4, v5.7.5, v5.7.6, v5.7.7, v5.7.8, v5.7.9, v5.8.0, v5.8.11, v5.8.12, v5.8.14, v5.8.15, v5.8.17, v5.8.18, v5.8.19, v5.8.2, v5.8.20, v5.8.22, v5.8.24, v5.8.27, v5.8.28, v5.8.29, v5.8.3, v5.8.30, v5.8.31, v5.8.32, v5.8.33, v5.8.34, v5.8.35, v5.8.36, v5.8.4, v5.8.8, v5.8.9, v6.0.0, v6.0.1, v6.0.2, v6.0.3, v6.0.4, v6.1.0, v6.10.0, v6.11.0, v6.12.0, v6.13.0, v6.13.1, v6.14.0, v6.15.0, v6.15.1, v6.16.0, v6.17.0, v6.17.1, v6.18.0, v6.18.1, v6.18.10, v6.18.11, v6.18.12, v6.18.13, v6.18.14, v6.18.15, v6.18.16, v6.18.17, v6.18.18, v6.18.19, v6.18.2, v6.18.20, v6.18.21, v6.18.22, v6.18.3, v6.18.4, v6.18.5, v6.18.6, v6.18.7, v6.18.8, v6.18.9, v6.2.0, v6.3.0, v6.4.1, v6.5.0, v6.5.1, v6.5.2, v6.6.0, v6.6.1, v6.6.2, v6.7.0, v6.8.0, v7.0.0, v7.0.1, v7.0.2, v7.0.3, v7.0.4, v7.0.5, v7.0.6, v7.0.7, v7.0.8, v7.1.0, v7.1.1, v7.1.2, v7.1.3, v7.10.0, v7.10.1, v7.10.2, v7.10.3, v7.11.0, v7.12.0, v7.13.0, v7.14.0, v7.14.1, v7.15.0, v7.16.0, v7.16.1, v7.17.0, v7.17.1, v7.17.2, v7.2.0, v7.2.1, v7.2.2, v7.3.0, v7.4.0, v7.5.0, v7.5.1, v7.5.2, v7.6.0, v7.6.1, v7.6.2, v7.7.0, v7.7.1, v7.8.0, v7.8.1, v7.9.0, v7.9.1, v7.9.2] but these are rejected by your constraint.
Problem 2
- The requested package illuminate/support 5.1.0 exists as illuminate/support[4.0.x-dev, 4.1.x-dev, 4.2.x-dev, 5.0.x-dev, 5.1.x-dev, 5.2.x-dev, 5.3.x-dev, 5.4.x-dev, 5.5.x-dev, 5.6.x-dev, 5.7.17, 5.7.18, 5.7.19, 5.7.x-dev, 5.8.x-dev, 6.x-dev, 7.x-dev, dev-master, 8.x-dev, v1.0.0, v1.1.0, v1.1.1, v1.1.2, v4.0.0, v4.0.0-BETA2, v4.0.0-BETA3, v4.0.0-BETA4, v4.0.1, v4.0.10, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7, v4.0.8, v4.0.9, v4.1.0, v4.1.1,
but these are rejected by your constraint.
composer.json：
{
"name": "laravel/laravel",
"type": "project",
"description": "The Laravel Framework.",
"keywords": [
"framework",
"laravel"
],
"license": "MIT",
"require": {
"php": "^7.2.5",
"fideloper/proxy": "^4.2",
"fruitcake/laravel-cors": "^1.0",
"guzzlehttp/guzzle": "^6.3",
"illuminate/events": "5.1.0",
"illuminate/support": "5.1.0",
"illuminate/session": "5.1.0",
"laravel/framework": "^7.0",
"laravel/tinker": "^2.0",
"laravel/ui": "^2.0"
},
"require-dev": {
"facade/ignition": "^2.0",
"fzaninotto/faker": "^1.9.1",
"mockery/mockery": "^1.3.1",
"nunomaduro/collision": "^4.1",
"phpunit/phpunit": "^8.5"
},
"config": {
"optimize-autoloader": true,
"preferred-install": "dist",
"sort-packages": true
},
"extra": {
"laravel": {
"dont-discover": []
}
},
"autoload": {
"psr-4": {
"App\\": "app/"
},
"classmap": [
"database/seeds",
"database/factories"
]
},
"autoload-dev": {
"psr-4": {
"Tests\\": "tests/"
}
},
"minimum-stability": "dev",
"prefer-stable": true,
"scripts": {
"post-autoload-dump": [
"Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
"@php artisan package:discover --ansi"
],
"post-root-package-install": [
"@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
],
"post-create-project-cmd": [
"@php artisan key:generate --ansi"
]
}
}