Ability to disable tmp caching of phar contents

Description

It's not clear to me what the point of caching phar contents is. In a world where opcache is used, it shouldn't be necessary to cache the phar contents anyway, except perhaps the occasional data file.

In addition, since different threads / processes don't share phar caches, /tmp can get very crowded with lots of files caching near-identical data.

I maintain a long-running application in which autoload time is not a concern, but the hogging of tmp space is a problem for my users. There doesn't seem to be a way to stop ext-phar from caching things read from phars.

首先追踪 ext-phar 对 phar-content 的缓存及其对 /tmp 的使用，同时考虑 opcache 上下文。验证一种禁用该缓存的方法，且不影响所需的 phar 读取；该 issue 未指出任何文件或测试，因此定位相关入口点也是工作的一部分。