php file_exists() return false on some directory on IIS

Question

Environment:

1. php5
2. windows2003
3. IIS with fastCGI

Code:

<?php
$p = "i:\\tmp";
if( file_exists($p) )
{
    print $p . ' exists!';
}
else
{
    print $p . ' not exists!';
}
?>

Answer 1

Make sure that directory is readable by checking it's permissions (chmod).

Alternatively, you might try using

is_readable()

function.

Answer 2

what does your code looks like? if you're testing with a string literal, don't forget that backslashes introduce escape sequences:

file_exists("D:\rip\this\nipple")

here \r is a carriage return, \t a tab, and \n a line feed.

Answer 3

If you are running PHP in safe mode then File_Exists will always return FALSE for files inaccessible due to safe mode restrictions.

Also note that the File_Exists caches it's result, so you might wan't to clear the cache with the ClearStatCache function

Answer 4

I get it:

when use

file_exist()

to test an existing directory, if parent directory has no read permission of IUSR_MACHINE, the test always fails.