Laravelでcomposer requireがエラーとなる

Question

環境

• PHP7.0.27
• Laravel 5.4.35
• Vagrant

起きているエラー

composer require barryvdh/laravel-debugbarコマンドを実行すると以下のようなエラーが出てしまいます。

Using version ^3.1 for barryvdh/laravel-debugbar
./composer.json has been updated
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 barryvdh/laravel-debugbar v3.1.5
    - Conclusion: don't install barryvdh/laravel-debugbar v3.1.4
    - Conclusion: don't install barryvdh/laravel-debugbar v3.1.3
    - Conclusion: don't install barryvdh/laravel-debugbar v3.1.2
    - Conclusion: don't install barryvdh/laravel-debugbar v3.1.1
    - Conclusion: remove laravel/framework v5.4.35
    - Installation request for barryvdh/laravel-debugbar ^3.1 -> satisfiable by barryvdh/laravel-debugbar[v3.1.0, v3.1.1, v3.1.2, v3.1.3, v3.1.4, v3.1.5].
    - Conclusion: don't install laravel/framework v5.4.35
    - barryvdh/laravel-debugbar v3.1.0 requires illuminate/session 5.5.x -> satisfiable by illuminate/session[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].
    - don't install illuminate/session v5.5.0|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.16|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.17|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.2|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.28|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.33|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.34|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.35|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.36|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.37|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.39|don't install laravel/framework v5.4.35
    - don't install illuminate/session v5.5.40|don't install laravel/framework v5.4.35
    - Installation request for laravel/framework (locked at v5.4.35, required as 5.4.*) -> satisfiable by laravel/framework[v5.4.35].

試してみたこと

バージョンの差異なのかと思い、composer.jsonに以下を追記

"config": {
  "preferred-install": "dist",
  "sort-packages": true,
  "optimize-autoloader": true,
  "platform": {
    "php": "7.0.27"
  }
}

ご助言いただけますと幸いです。

Answer 1

composer require barryvdh/laravel-debugbar:~2.4で試してみてください。
最新バージョンがv5.4.35に対応していない可能性が高いです。
https://github.com/barryvdh/laravel-debugbar#user-content-for-laravel--55-please-use-the-24-branch

Comments

[kenny_sayama]

まさにその通りでした！
回答いただきありがとうございました！