What scenarios in PHP are appropriate for using memory sharing?

The only thing I use in my daily life is that the front-end page loops through AJAX requests for an address, but I need to get the data after the last data business process (but don't want to store it in the database) when requested.

I do not know what are the high-class application scenarios?

Or what is the advantage of PHP shared memory with our use of memcache or Redis extensions?

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The only thing I use in my daily life is that the front-end page loops through AJAX requests for an address, but I need to get the data after the last data business process (but don't want to store it in the database) when requested.

I do not know what are the high-class application scenarios?

Or what is the advantage of PHP shared memory with our use of memcache or Redis extensions?

PHP shared memory can be used to communicate and share data between processes on a single server, but not across servers, memcache and Redis can be deployed independently as memory servers

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