更新symfony/flex失败，执行Composer命令遇兼容错误求助

执行composer install --ignore-platform-reqs时出现以下错误：

In ParallelDownloader.php line 212:

Declaration of Symfony\Flex\ParallelDownloader::getRemoteContents($originUrl, $fileUrl, $context) should be compatible with Composer\Util\RemoteFilesystem::getRemoteContents($originUrl, $fileUrl, $context, ?array &$responseHeaders = NULL)

尝试执行composer update symfony/flex --no-plugins --no-scripts仍遇到相同错误，可按以下步骤解决：

• 先强制卸载并重新安装symfony/flex：

  composer remove symfony/flex --no-plugins --no-scripts
  composer require symfony/flex --no-plugins --no-scripts
  

• 若上述方法无效，清理Composer缓存后再更新：

  composer clear-cache
  composer update symfony/flex --no-plugins --no-scripts
  

• 要是问题依旧，手动删除项目的vendor目录和composer.lock文件后重新安装：

  rm -rf vendor composer.lock
  composer install --ignore-platform-reqs
  

内容的提问来源于stack exchange，提问作者phperson