I recommend here, if you want to do SNs, you can use UCHOME.

If there seems to be a lot of ASP source code, go to the source station to see if it is ok.

If it is PHP, you can choose Yangzhou to make friends, but it is a personal development. It is not necessarily an enterprise-level architecture to operate in a big station.

If you want to design a robust enterprise-level data processing structure, I recommend you to use the officially developed oelove of OEcms, which may be used by many people. His expansibility and code design are very good, as can be seen from the OECMS they developed.

As for whether making friends is open source, I don't know whether they protect business users!