How PHP is mixed with C language programming

I was curious to hear that some of the projects were based on PHP, and C came to the bottom, and I wondered how they worked together. I know that there is a way to write C into PHP's extension library, to PHP to call? Is that right?

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I was curious to hear that some of the projects were based on PHP, and C came to the bottom, and I wondered how they worked together. I know that there is a way to write C into PHP's extension library, to PHP to call? Is that right?

Use C to develop extensions for compute-intensive business scenarios.

And more often, is based on the micro-service architecture, a low-level system developed in the C language, the PHP exposed tcp/http RPC interface. That is, the use of the network to achieve cross-language.

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