Spiros,
I think you are not getting any responses because you have not provided enough detail in your question.
Whilst Philips is a product manufacturer, it sells under the Philips name many products made by other manufacturers as well as its own.
If your Philips DVD has actually been made by Philips, then it is likely to use a Philips infrared protocol, whereas if it is an OEM (Original Equipment Manufacturer) then it is more likely to use the NEC or Sony protocols which are very different.
So, when requesting information, may I suggest you provide full information including model number of the unit.