您的要求无法解决为一组可安装的软件包。 Laravel 5.6吗？

Question

这是CMD的屏幕截图

CMD中的错误消息：

  

问题1
      -结论：请勿安装laravel / framework v5.6.29
      -结论：请勿安装laravel / framework v5.6.28
      -结论：请勿安装laravel / framework v5.6.27
      -结论：请勿安装laravel / framework v5.6.26
      -结论：请勿安装laravel / framework v5.6.25
      -结论：请勿安装laravel / framework v5.6.24
      -结论：请勿安装laravel / framework v5.6.23
      -结论：请勿安装laravel / framework v5.6.22
      -结论：请勿安装laravel / framework v5.6.21
      -结论：请勿安装laravel / framework v5.6.20
      -结论：请勿安装laravel / framework v5.6.19
      -结论：请勿安装laravel / framework v5.6.18
      -结论：请勿安装laravel / framework v5.6.17
      -结论：请勿安装laravel / framework v5.6.16
      -结论：请勿安装laravel / framework v5.6.15
      -结论：请勿安装laravel / framework v5.6.14
      -结论：请勿安装laravel / framework v5.6.13
      -结论：请勿安装laravel / framework v5.6.12
      -结论：请勿安装laravel / framework v5.6.11
      -结论：请勿安装laravel / framework v5.6.10
      -结论：请勿安装laravel / framework v5.6.9
      -结论：请勿安装laravel / framework v5.6.8
      -结论：请勿安装laravel / framework v5.6.7
      -结论：请勿安装laravel / framework v5.6.6
      -结论：请勿安装laravel / framework v5.6.5
      -结论：请勿安装laravel / framework v5.6.4
      -结论：请勿安装laravel / framework v5.6.3
      -结论：请勿安装laravel / framework v5.6.2
      -结论：请勿安装laravel / framework v5.6.1
      -结论：请勿安装symfony / process v4.1.3
      -laravel / framework 5.6。*的安装要求-laravel / framework可满足[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，v5.6.18，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，v5.6.4，v5.6.5，v5.6.6，v5.6.7，   v5.6.8，v5.6.9]。       -结论：请勿安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.1 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.2 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.3 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.4 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.5 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.6 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.7 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.8 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.9 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.10 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.11 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.12 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.13 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.0.14 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.1.0 |安装phpspec / phpspec 2.5.8
      -结论：请勿安装symfony / process v4.1.1 |安装phpspec / phpspec 2.5.8

- laravel/framework v5.6.0 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.10, v4.0.11,

     

v4.0.12，v4.0.13，v4.0.14，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，v4.1.2，v4.1.3]。       -结论：请勿安装symfony / process v4.1.2 |安装phpspec / phpspec 2.5.8       -phpspec / phpspec〜2.1的安装请求-> phpspec / phpspec可满足[2.1.0、2.1.1、2.2.0、2.2.1、2.3.0、2.4.0、2.4.1，   2.5.0、2.5.1、2.5.2、2.5.3、2.5.4、2.5.5、2.5.6、2.5.7、2.5.8]。

我的镇静：

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "laravel/framework": "5.6.*"
    },
    "require-dev": {
        "phpunit/phpunit": "~4.0",
        "phpspec/phpspec": "~2.1"
    },
    "autoload": {
        "classmap": [
            "database"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    },
    "autoload-dev": {
        "classmap": [
            "tests/TestCase.php"
        ]
    },
    "scripts": {
        "post-install-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize"
        ],
        "post-update-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize"
        ],
        "post-create-project-cmd": [
            "php -r \"copy('.env.example', '.env');\"",
            "php artisan key:generate"
        ]
    },
    "config": {
        "preferred-install": "dist"
    }
}

如何更新到 Laravel 5.6 ？

Answer 1

尝试删除 composer.lock文件 + 供应商文件夹

然后再次运行composer install