I have compiled a PHP Extension Module. in the extension module, I need to call another dynamic library and write it myself. In Linux

I have compiled a PHP Extension Module. in the extension module, I need to call another dynamic library and write it myself. In Linux, there are two dynamic libraries, one for sqlite and the other for postgresql. The two dynamic library interfaces are the same. Another PHP Extension Module calls the dynamic library of sqlite or the dynamic library of postgresql. In Windows, you can write a PHP extension module by yourself. in the extension module, you need to call another dynamic library, which is also written by yourself. In Linux
This is the case.
There are two dynamic libraries, one for sqlite and the other for postgresql. The two dynamic library interfaces are the same.
Another PHP Extension Module calls the dynamic library of sqlite or the dynamic library of postgresql.
Windows is normal. the corresponding lib will be found during the link, and sqlite or postgresql can be called.
However, in Linux, when compiling the PHP extension module, you only need to find the header file instead of the dynamic library. Compilation is successful, but an error occurs during running. How can this problem be solved.
------ Solution --------------------
First ldd to see if your extensions have found dynamic libraries.
If you can add the dynamic library search path in ld. so. conf