Issue: https://github.com/php/php-src/issues/11771
Author: remco-pc
### Description
In the comments of https://www.php.net/manual/en/ref.shmop.php
Why not implement a $_SHARED or $_MUTUAL SuperGlobal in which we can create variables at will, and
that is shared by all connections?
This would greatly improve performance of many PHP applications, and could save a lot of burden on
server memory. Especially if those variables could be classes containing functions.
You could implement that it is up to the programmer to guard atomicity.
Such superglobal would be feasible on windows servers as well.
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My question: or is there an easy way of injecting those in the $_SERVER global, default functions,
classes and traits read straight from the memory. Which reduces disk reads.