Php 编写器更新：无法将您的需求解析为可安装的软件包集

我正在尝试从laravel 5.5升级到5.6。我一直在用这个

首先，我尝试将

laravel/framework

更新为

5.6.*

和

phpunit/phpunit

更新为

~7.0

这会产生一个错误

您的需求无法解析为一组可安装的软件包。

我理解这意味着什么，但错误日志确实很难解析，我已经尝试了几个小时将

composer.json

文件更改为一组可安装的包。
我自己还没修好，所以我来找你。也许你们中的一些人真的喜欢解决这些问题

因此，我现在的

composer.json

，在它的辉煌中：

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "php": ">=7.1",
        "laravel/framework": "5.6.*",
        "jenssegers/rollbar": "^1.4",
        "doctrine/dbal": "~2.3",
        "sensiolabs/security-checker": "^3.0",
        "guzzlehttp/guzzle": "~6.0",
        "mandrill/mandrill": "1.0.*",
        "lcobucci/jwt" : "^3.1",
        "predis/predis": "~1.0"
    },
    "require-dev": {
        "fzaninotto/faker": "~1.4",
        "mockery/mockery": "0.9.*",
        "phpunit/phpunit": "~7.0",
        "phpspec/phpspec": "~4.0",
        "laravel/homestead" : "~4.0",
        "symfony/dom-crawler": "3.1.*",
        "symfony/css-selector": "3.1.*",
        "filp/whoops": "~2.0"
    }
}

和当前错误：

➔ composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Conclusion: don't install laravel/framework v5.6.15
    - Conclusion: don't install laravel/framework v5.6.14
    - Conclusion: don't install symfony/process v4.0.7
    - Conclusion: don't install laravel/framework v5.6.13
    - Conclusion: don't install symfony/process v4.0.6
    - Conclusion: don't install symfony/process v4.0.5
    - Conclusion: don't install symfony/process v4.0.4
    - Conclusion: don't install symfony/process v4.0.3
    - Conclusion: don't install symfony/process v4.0.2
    - Installation request for laravel/homestead ~4.0 -> satisfiable by laravel/homestead[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5].
    - Conclusion: don't install symfony/process v4.0.1
    - laravel/framework v5.6.0 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.1 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.10 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.11 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.12 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.2 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.3 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.4 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.5 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.6 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.7 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.8 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - laravel/framework v5.6.9 requires symfony/process ~4.0 -> satisfiable by symfony/process[v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7].
    - Conclusion: don't install symfony/process v4.0.0
    - Installation request for laravel/framework 5.6.* -> satisfiable by laravel/framework[v5.6.0, v5.6.1, v5.6.10, v5.6.11, v5.6.12, v5.6.13, v5.6.14, v5.6.15, v5.6.2, v5.6.3, v5.6.4, v5.6.5, v5.6.6, v5.6.7, v5.6.8, v5.6.9].

---

我真的希望有人能理解作曲家在这里的意思。我很想自己也能做到这一点，但似乎同一个问题的所有其他解决方案都是专门针对

composer.json

，而不是一般的答案。

对于这种情况，我必须做以下几点：

• 我将

  php

  更新为

  ^7.1.3

• sensiolabs/security checker

  至

  ^4.1

• phpspec

  至

  ~4.0

• laravel/homestead

  至

  ~7.3

• symfony/dom爬虫

  和

  symfony/css选择器

  到

  ^4.0

• 删除对

  composer optimize

  的引用，因为它现在已被删除
• 停止使用

  configuremonogusing（…）

  并为Rollbar创建一个自定义记录器类

---

感谢评论中的所有帮助

从该指南中：“Laravel 5.6需要PHP7.1.3或更高版本。”查看是否将

“PHP:”>=7.1“，

更改为

“PHP:”^7.1.3“，

helpsTry添加

symfony/process

，并从该指南中：“Laravel使用的所有底层Symfony组件都已升级到Symfony~4.0发行版系列。”您可能应该将所有Symfony组件更新到4

rm-rf./vendor&composer update

，如果仍然出现这种情况，您需要将PHP升级到7.1.14。我想您可以在

之前添加
“Symfony/process”：“^4.0”
”laravel/framework:“5.6.*”，

到您的

要求

并查看发生了什么