Both .php and .pcr files are projects from old CreataCard software for making new greetings cards, so if any software can help you out with php to pcr conversion it would be this tool. Unfortunately, it has been discontinued years ago, so you would have to somehow obtain a copy of this software.
There is CreateCard app available for iOS devices, but it doesn't seem that it work with these old file types. You can always try to contact their support.