MPH (MonkeyPhoto)
From Just Solve the File Format Problem
.mph files are image template files for MonkeyPhoto. MonkeyPhoto is a discontinued application for photo management, greeting cards, etc. It was developed by a company named Monkeymen.
All the MPH files we've examined are just JPEG files with an unconventional filename extension. So, MPH probably isn't actually a format. We document it because it appears in some lists of graphics formats.
More research would be needed to determine if MPH files can have any formats other than JPEG.
Software
Sample files
Many MPH files are included with the software. Some versions of the InstallMonkeyPhoto.exe distribution file are in an NSIS format that can be opened by 7-Zip, without installing.
