Why is directory with permissions 777 not writable?

[guillermobytes]

hi there,

i'm having a problem with a directory under unix (Mac OS X).
I would like to use

file_put_contents($dir, file_get_contents(...));

the problem is that the destination directory $dir is not writable.
ok, so what i did is to chmod 777 $dir.
so now file permissions are :

ls -l /Users/gui/Desktop/images

output

drwxrwxrwx  2 gui  staff       68 Nov 20 01:23 images

and when in php i ask :

$dir = "/Users/gui/Desktop/images";
is_writable($dir); // false

i cant understand why it is not writable..

is that even possible??

thanks for your help!
regards

[Dormilich]

run it again and use clearstatcache() beforehand, does that still give false?

[guillermobytes]

thanks Dormilich for your help, but still...

is_writable() // false

i have a problem with my harddrive and filesystem is corrupted, maybe that is why it does not work.
I'll try to fix the filesystem corruption and then run it again.

regards