How to set default permissions for new files created with php

php umask
user550 picture user550 · May 21, 2013 · Viewed 20k times · Source

Hi I am running a centos server and I want to know how I can set the default chmod of a newly created file that is created by php like fopen. At the moment it is doing 644 but I want 666 so where can I specify this setting?

Answer

Marc B picture Marc B · May 21, 2013

You can use umask() immediately before the fopen() call, but umask shouldn't be used if you're on a multi-threaded server - it'll change the mask for ALL threads (e.g. this change is at the process level), not just the one that you're about to use fopen() in.

e.g.

$old = umask(000);
fopen('foo.txt', 'w'); // creates a 0666 file
umask($old) // restore original mask

It'd be easier to simply chmod() after the fact, however:

fopen('foo.txt', 'w'); // create a mode 'who cares?' file
chmod('foo.txt', 0666); // set it to 0666

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