Is there any way to remove the contents of an file in php, do we have any php command that does that, I know `unlink` but I do not want to delete the file instead I just want to remove the contents of that file. 

I have an file which I pass while called a `getCurrentDBSnap` function, it takes in the file from `/home/test/incoming` folder and populates currentDB table state into the file using `fputcsv` and puts back file to `/home/test/outgoing`. 

Currently file stays in incoming folder and when I can call the function `getCurrentDBSnap` it would take the file and override with latest state of DB into it. 

**Q:** My question is, is it possible instead of overwriting the file, we can remove the content of file after ever `getCurrentDBSnap` such that file in incoming folder would be always empty ?

Hope it makes sense :)