php - Read file on a network drive

Question

I'm running Xampp on a Windows Server ; Apache is running as a service with a local account. On this server, a network share is mounted as X: with specific credentials.

I want to access files located on X: and run the following code

<?php
echo shell_exec("whoami");
fopen('X:\text.txt',"r");
?>

and get

theservernamehelocaluser
Warning: fopen(X:ext.txt) [function.fopen]: failed to open stream: No such file or directory

I tried to run Apache, not as a service but directly by launching httpd.exe ... and the code worked.

I can't see what causes the difference between the service and the application and how to make it works.

Answer 1

You're not able to do this using a drive letter, as network mapped drives are for a single user only and so can't be used by services (even if you were to mount it for that user).

What you can do instead is use the UNC path directly, for example:

fopen('\\server\share\text.txt', 'r');

Note, however, that there are a few issues with PHP's filesystem access for UNC paths. One example is a bug I filed for imagettftext, but there are also issues with file_exists and is_writeable. I haven't reported the latter because as you can see from my long-outstanding bug with imagettftext, what's the point.