下载并安装 composer：
把 composer 放到 /usrlocal/bin:
参考:
<a href="https://getcomposer.org/">composer 主页</a>
<a href="https://getcomposer.org/doc/00-intro.md#globally">installation - linux / unix / osx</a>
下载并安装 composer：
把 composer 放到 /usrlocal/bin:
参考:
<a href="https://getcomposer.org/">composer 主页</a>
<a href="https://getcomposer.org/doc/00-intro.md#globally">installation - linux / unix / osx</a>
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