symfony - Composer 太老了

Question

我在尝试启动 symfony 时遇到问题，错误是:

composer require server --dev
Some Symfony Flex features may not work as expected: your version of Composer is too old
Please upgrade using https://getcomposer.org/

我尝试更新 Composer ，但在 Composer 文档 here 中找不到方法我按照步骤但是:

php -r "if (hash_file('SHA384', 'composer-setup.php') === '52cb7bbbaee720471e3b34c8ae6db53a38f0b759c06078a80080db739e4dcab6') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
Installer corrupt

所以，我陷入了错误循环，我该怎么办？

(我在ubuntu工作)

当然我试过:

composer self-update


  [InvalidArgumentException]             
  Command "self-update" is not defined. 

Answer 1

命令self-update i 仅在您将 composer 安装为 phar 时可用，而不是作为全局项目中的依赖项或通过 apt 安装。

所以需要卸载composer并用 phar 重新安装它，然后你就可以使用自我更新了

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