Can I use XML Document for a blog which will be higly visited and edited???

[Pranav]

This xml document will be edited with php, and there can be a posibbility, that numerous users will try to edit or add new comments to it at one time. Will it be safe to use XML Document for the storing info point of view.Thanx in advancePranav

[Andrei C]

It is possible to use it because the operation of writing file to disk, or the time when you keep file opened is small and the probability for two user to write in file in the same moments is small.