set file attributes with php?

[Mikemcs]

Is it Possible to set file attributes using php (example: Readonly)

[SP8600]

Sure is. Its done like this:

chmod($fileName,0755);

Have a look at this for more information.

[Mordecai]

That's for Linux only. For Windows, you'll have to use:
exec("attrib +something -something file.txt");

Use + to add something, or - to erase something.
Codes to use:
H - Hidden
A - Archive
S - System
R - Read Only

For instance:
attrib -h -a -s -r file.txt
This erases every attribute off the file.