Creating dirs with correct chmod in PHP

One trick I've been dragging with me on all this years of PHP programing is a little snippet to correctly create directories with the chmod I want.

By simply calling mkdir('my_dir', 0777) I used to often end up with directories that I can't write to nor delete, even if I was correctly setting the chmod.

The trick was to reset the mask (using umask(0)) before the mkdir()call and then reapplying the old mask after.

$tmpUmask = umask(0);
mkdir('my_dir', 0777);
umask($tmpUmask);

I must admit that I've never really understand why it was working better than simply calling mkdir() but hey, it's been years that I'm using that now and I never run into access rights issues since.

Tags : #mkdir, #umask, #php, #chmod

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