无法安装Composer:无法将您的需求解析为可安装的软件包集

Question

我是symfony1的新手。4.我正在尝试在现有项目中安装composer我运行安装命令获取以下信息：

加载包含包信息的composer存储库安装依赖项（包括require dev）无法将您的需求解析为可安装的包集。

问题一：

- symfony/console v2.5.4 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.5.3 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.5.2 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.5.1 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.5.0 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.4.9 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.4.8 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.4.7 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.4.6 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.4.5 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.4.4 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.4.3 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.4.2 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.4.1 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.4.0 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.9 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.8 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.7 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.6 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.5 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.4 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.3 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.2 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.19 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.18 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.17 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.16 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.15 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.14 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.13 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.12 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.11 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.10 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.1 requires php >=5.3.3 -> no matching package found.
- symfony/console v2.3.0 requires php >=5.3.3 -> no matching package found.
- Installation request for symfony/console ~2.3 -> satisfiable by symfony/console[v2.3.0, v2.3.1, v2.3.10, v2.3.11, v2.3.12, v2.3.13, v2.3.14, v2.3.15, v2.3.16, v2.3.17, v2.3.18, v2.3.19, v2.3.2, v2.3.3, v2.3.4, v2.3.5, v2.3.6, v2.3.7, v2.3.8, v2.3.9, v2.4.0, v2.4.1, v2.4.2, v2.4.3, v2.4.4, v2.4.5, v2.4.6, v2.4.7, v2.4.8, v2.4.9, v2.5.0, v2.5.1, v2.5.2, v2.5.3, v2.5.4].

潜在原因：

• 包名中的一个错别字
• 根据您的最小最大稳定性设置，该软件包没有足够稳定的版本，请参阅https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussionf或更多详细信息。

阅读http://getcomposer.org/doc/articles/troubleshooting.md了解更多常见问题。

Answer 1

安装Composer后，运行以下命令安装Composer资产插件：

php composer.phar global require "fxp/composer-asset-plugin:~1.0.3"