Under Linux, how to add a configuration file to the PHP extension?

There are two types of PHP (I know it now) and the way to expand.
The first way to expand is to introduce extension files directly in php.ini (e.g. redis.so)

The second is to introduce an extension configuration file (for example, Redis.ini) and then introduce a specific extension in the extension configuration file (Redis.ini write Extension=redis.ini)

What is the second way to achieve this?

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There are two types of PHP (I know it now) and the way to expand.
The first way to expand is to introduce extension files directly in php.ini (e.g. redis.so)

The second is to introduce an extension configuration file (for example, Redis.ini) and then introduce a specific extension in the extension configuration file (Redis.ini write Extension=redis.ini)

What is the second way to achieve this?

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