Php5.5 failed to dynamically load the extension Library

Php5.5 failed to dynamically load the extension Library:
I upgraded the php version through cross-compilation. our original php Extension Library is loaded in the form of a dynamic link library, that is, only in php. the extension path and name are added to the INI file, and the extension library is not loaded in the code dl.
The problem is that the php version is not loaded to the extension Library after upgrade, and the php. ini file is normal. I am very grateful to you for your reference.

Reply to discussion (solution)

Is there anyone? Help!

Php extensions are bound to the main file version.
That is, the extension must be compiled with the main file.

Brother on the third floor. Our previous method was to compile the php extension and the main application separately. You only need to load it through the INI file.
The same is true in my official documents.

Good. it is also possible to compile separately!
But you don't have to compile it.
The version of the main program has changed, and the extension has to be changed.

Thank you. I thought the dynamic link library does not need to be changed.