is there a way to combine two phpmaker projects? same version.
It depends on if the main database are the same and the table names are different. If yes (that means they have no conflicts), I believe you can rename the other project file extension from .pmp to .prp and try to import it like as PHP Report Maker project. (Assume v2020)
You’d better backup your .pmp file first before doing this. You may open the .pmp file from text editor such as Notepad++, and customize it as you want.