After php extension development calls the dynamic library compilation, it cannot be found in phpinfo and cannot call the function.

After php extension development calls the dynamic library compilation, it cannot be found in phpinfo, and function RT cannot be called. At the beginning, I tried to use c to call the extension library and run it successfully. However, php cannot load after the extension call and compilation is completed through php. Please help me a lot

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Are you sure you have installed the extension successfully?
View the phpinfo file

Are you sure you have installed the extension successfully?
View the phpinfo file

The problem is that I removed the call to the dynamic library and displayed it in phpinfo in the compilation extension. If it is added, it will not work. Ask the moderator for help

After gdb debugging, the system prompts undefined symbol: xxxxx. However, I have introduced the header file before.