如何安装/启用PHP phar扩展？

Question

我正试图在 KnownHost VPS 上安装 Composer。当运行这个命令时：

curl -sS https://getcomposer.org/installer | php

得到了这个错误消息：

Some settings on your machine make Composer unable to work properly.
Make sure that you fix the issues listed below and run this script again:

The phar extension is missing.
Install it or recompile php without --disable-phar

如何安装 phar 扩展? 我正在 VPS 上运行 PHP 5.4.22。

Answer 1

In the end I solved this by getting my host to rebuild PHP with PDO support.