There is only one file type that uses the .WPH extension:
Phoenix BIOS File
BIOS file used by computer systems that use the Phoenix BIOS; contains system-level data for controlling low-level devices; can be "flashed," or installed, to the computer's EEPROM using the program phlash16.exe; usually has the filename BIOS.WPH.
The Phoenix BIOS is installed on some computer systems from Acer, Dell, Compaq, Sony, and HP.
Updated: September 30, 2010