How php and C language mixed programming

I have heard that some projects are the foundation of php, while c is the bottom layer. I'm curious about how they worked together before? I know there is a way to write c as the php Extension Library and call it in php? Is that true? I have heard that some projects are the foundation of php, while c is the bottom layer. I'm curious about how they worked together before? I know there is a way to write c as the php Extension Library and call it in php? Is that true?

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I have heard that some projects are the foundation of php, while c is the bottom layer. I'm curious about how they worked together before? I know there is a way to write c as the php Extension Library and call it in php? Is that true?

C language is used to develop and expand suitable for computing-intensive business scenarios.

Most of the time, it is based on the microservice architecture that uses C language to develop an underlying system and expose the tcp/http RPC Interface to PHP. That is, the network is used to implement cross-language.