Question

我已经在使用symfony 3，我已经用它创建了很多项目，所以现在我正在尝试用symfony 4创建一个项目，但是当我键入以下命令时我不能：

composer create-project symfony/skeleton my-project-symf-4

项目创建成功，但是使用此版本3.4而不是4.2创建的问题

Installing symfony/skeleton (v3.4.22.1)
  - Installing symfony/skeleton (v3.4.22.1): Downloading (100%)
Created project in my-project-symf-4
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Package operations: 22 installs, 0 updates, 0 removals
  - Installing symfony/flex (v1.1.8): Downloading (100%)

Prefetching 21 packages
  - Downloading (100%)
  - Installing psr/cache (1.0.1): Loading from cache
  - Installing psr/container (1.0.0): Loading from cache
  - Installing psr/simple-cache (1.0.1): Loading from cache
  - Installing symfony/polyfill-mbstring (v1.10.0): Loading from cache
  - Installing psr/log (1.1.0): Loading from cache
  - Installing symfony/debug (v3.4.22): Loading from cache
  - Installing symfony/console (v3.4.22): Loading from cache
  - Installing symfony/dotenv (v3.4.22): Loading from cache
  - Installing symfony/routing (v3.4.22): Loading from cache
  - Installing symfony/http-foundation (v3.4.22): Loading from cache
  - Installing symfony/event-dispatcher (v3.4.22): Loading from cache
  - Installing symfony/http-kernel (v3.4.22): Loading from cache
  - Installing symfony/finder (v3.4.22): Loading from cache
  - Installing symfony/filesystem (v3.4.22): Loading from cache
  - Installing symfony/dependency-injection (v3.4.22): Loading from cache
  - Installing symfony/config (v3.4.22): Loading from cache
  - Installing symfony/class-loader (v3.4.22): Loading from cache
  - Installing symfony/polyfill-apcu (v1.10.0): Loading from cache
  - Installing symfony/cache (v3.4.22): Loading from cache
  - Installing symfony/framework-bundle (v3.4.22): Loading from cache
  - Installing symfony/yaml (v3.4.22): Loading from cache
Generating autoload files

因此您可以看到作曲家从缓存加载所有软件包。我尝试像这样清除作曲家缓存：

$ composer clearcache

但没有结果，问题仍然存在。

我的PHP版本是7.3.1

有人可以帮助我解决该问题吗？

Answer 1

尝试像这样通过symfony版本（例如4.2）：

composer create-project symfony/skeleton:4.2 my-project-symf-4

希望这会有所帮助！

Answer 2

如果您在系统中安装了symfony CLI，则只需运行以下命令并指定版本号即可

例如，创建一个4.4版本的Symfony项目，请按照以下命令运行

symfony new my_project_name --version = 4.4

无法创建Symfony 4项目

2 个答案: