作曲家更新不起作用无效版本

Question

嗨，有人可以帮我这个忙吗？我无法更新作曲家，我尝试删除composer.lock，我试着作曲家安装，我试着作曲家更新，我得到的只是这个错误：

使用包信息加载作曲家存储库

  [UnexpectedValueException]
  Invalid version string ">=7.1.0"


update [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--lock] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [--no-suggest] [--with-dependencies] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--ignore-platform-reqs] [--prefer-stable] [--

prefer-lowest] [-i|--interactive] [--root-reqs] [--] [<packages>]...

这是我的composer.json文件：

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "config": {
        "platform": {
            "php": ">=7.1.0"
        },
        "preferred-install": "dist",
        "sort-packages": true,
        "optimize-autoloader": true
    },
    "require": {
        "php": ">=5.6.4",
        "barryvdh/laravel-debugbar": "^2.3",
         "barryvdh/laravel-dompdf": "^0.8.1",
        "brozot/laravel-fcm": "^1.2",
        "doctrine/dbal": "^2.5",
        "guzzlehttp/guzzle": "^6.2",
        "intervention/image": "^2.3",
        "laravel/framework": "5.5.*",
        "laravel/passport": "^3.0",
        "laravel/socialite": "^3.0",
        "laravel/tinker": "~1.0",
        "laravelcollective/html": "~5.0",
        "braintree/braintree_php" : "3.23.0"
    },
    "require-dev": {
        "fzaninotto/faker": "~1.4",
        "mockery/mockery": "0.9.*",
        "phpunit/phpunit": "~6.0",
        "filp/whoops": "~2.0"
    },
    "autoload": {
        "classmap": [
            "database"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\\": "tests/"
        }
    },
    "scripts": {
        "post-root-package-install": [
            "php -r \"file_exists('.env') || copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "php artisan key:generate"
        ],
        "post-install-cmd": [
            "Illuminate\\Foundation\\ComposerScripts::postInstall",
            "php artisan optimize"
        ],
        "post-update-cmd": [
            "Illuminate\\Foundation\\ComposerScripts::postUpdate",
            "php artisan optimize"
        ],
        "post-autoload-dump": [
        "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
        "@php artisan package:discover"
        ]
    }
}

任何人都可以帮忙它什么是行不通的..

Answer 1

在platform配置中，您必须设置要让作曲家使用的PHP的确切版本，而不是约束：

    "platform": {
        "php": "7.1.0"
    },

https://getcomposer.org/doc/06-config.md#platform