In fast-cgi mode, are there any formal regulations for reading php.ini?

Some read c:windowsphp.ini, some read the registry, and some read the current path of php.
Is there any formal rule on which order to read the php.ini configuration file?

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Some read c:windowsphp.ini, some read the registry, and some read the current path of php.
Is there any formal rule on which order to read the php.ini configuration file?

I don’t know what the poster wants to ask, there is only one file in php.ini

phpinfo() Take a look at the php.ini path currently used by phpfpm. There is only one path. To change it, just change this file.