In the actual development project, the php extension of wamp on the server, php setting and apache Module

I currently have a server. Question 1: in actual development, which of the php extension and apache modules must be enabled? What are their respective roles? For example, what can be used for caching and gzip to accelerate user access. Question 2: Is there any significant impact on performance when the scale-up is too large...

I currently have a server,
Question 1: Which php extensions and apache modules must be enabled in actual development? What are their respective roles?
For example, what can be used for caching and gzip to accelerate user access.

Question 2: whether the performance is greatly affected when the scale-up is too large

Question 3: which books can I introduce in detail?

Php extension

Apache Module

Php settings

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I currently have a server,
Question 1: Which php extensions and apache modules must be enabled in actual development? What are their respective roles?
For example, what can be used for caching and gzip to accelerate user access.

Question 2: whether the performance is greatly affected when the scale-up is too large

Question 3: which books can I introduce in detail?

Php extension

Apache Module

Php settings