如何安装 laravel？

Question

我在尝试全局安装 laravel 时遇到错误。

当我写composer global require laravel/installer 我得到这个错误：

Problem 1

    - Installation request for laravel/installer ^3.1 -> satisfiable by laravel/installer[v3.1.0].

    - Conclusion: remove symfony/console v3.4.38

    - Conclusion: don't install symfony/console v3.4.38

    - laravel/installer v3.1.0 requires symfony/console ^4.0|^5.0 -> satisfiable by symfony/console[v4.0.0, v4.0.1, v4.0.10, v4.0.11, v4.0.12, v4.0.13, v4.0.14, v4.0.15, 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, v4.1.2, v4.1.3, v4.1.4, v4.1.5, v4.1.6, v4.1.7, v4.1.8, v4.1.9, v4.2.0, v4.2.1, v4.2.10, v4.2.11, v4.2.12, v4.2.2, v4.2.3, v4.2.4, v4.2.5, v4.2.6, v4.2.7, v4.2.8, v4.2.9, v4.3.0, v4.3.1, v4.3.10, v4.3.11, v4.3.2, v4.3.3, v4.3.4, v4.3.5, v4.3.6, v4.3.7, v4.3.8, v4.3.9, v4.4.0, v4.4.1, v4.4.2, v4.4.3, v4.4.4, v4.4.5, v4.4.6, v4.4.7, v4.4.8, v5.0.0, v5.0.1, v5.0.2, v5.0.3, v5.0.4, v5.0.5, v5.0.6, v5.0.7, v5.0.8].

    - Can only install one of: symfony/console[v4.0.0, v3.4.38].

    - Can only install one of: symfony/console[v4.0.1, v3.4.38].

    - Can only install one of: symfony/console[v4.0.10, v3.4.38].

    - Can only install one of: symfony/console[v4.0.11, v3.4.38].

    - Can only install one of: symfony/console[v4.0.12, v3.4.38].

    - Can only install one of: symfony/console[v4.0.13, v3.4.38].

    - Can only install one of: symfony/console[v4.0.14, v3.4.38].

Answer 1

使用以下附加参数运行您的命令：composer global require laravel/installer --update-with-all-dependencies

Answer 2

   - Conclusion: remove symfony/console v3.4.38     - Conclusion: don't install symfony/console v3.4.38您需要删除或升级symfony/console. 要删除它，请运行composer global remove symfony/console。

Answer 3

实际应该运行的命令是composer global require laravel/installer --update-with-dependencies