Problem with Arabic characters !

[eluser]Adamito[/eluser]
Hello !

I'm working on educational platform for Moroccan students in high schools.
In this platform, any one can submit a lesson or exercise even in Arabic by special form with textarea.
The content of textarea is put in txt file !

The problem is that all Arabic characters are transformed in html entities like this :

Code:

مام مصنع

Is there any helper or library who do this by default ?
What is the solution if I want to put Arabic characters in txt file ?

Thanks !

Adamito!