The problem is rather straightfoward -
XAMPP for Linux only runs on x86 and IA64 Processors. Its a binary compatibility issue. XAMPP would have to be compiled with a C compiler specifically for other processor families, such as ARM or Itanium. Each processor family has a unique machine instruction set, x86 and IA64 share a common 32bit instruction set, so XAMPP can run on both families.
There are Apache, PHP, MySQL binaries and repositories for make/build that are specific to ARM processors