Warning message for file I/O

[Anon]

I keep getting this PHP warning:

Warning: Unable to find file identifier 0 in /u/web/mysite/myfile at line xxx

when I run a certain PHP file that does some file I/O.

And yet, I can see the file that is being opened and processed (near line xxx), and it works fine, gets written to, etc.

What is this warning really trying to say?

[chaostik]

Zero (ie FALSE), is returned when an fopen() fails for some reason. There must be somthing like a typo, bad permissions etc on the file that you are attempting to open.

I find the most common problem is that you can open the file when you are logged in as your standard user, but you must check you can open the file for reading/writing (as appropriate) when you are acting as the same user the webserver runs as.

If that works fine there may be a coding problem. If you paste the code in then we can look for it.

All the best,

Louis