How to set default permissions for new files created with php

问题

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?

回答1:

Like Linux, PHP has a chmod() command that can be invoked to change file permissions.

See the documentation here: http://php.net/manual/en/function.chmod.php

For a default setting you might try what Patrick Fisher states here: Setting the umask of the Apache user

[root ~]$ echo "umask 000" >> /etc/sysconfig/httpd
[root ~]$ service httpd restart

回答2:

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

来源：https://stackoverflow.com/questions/16672429/how-to-set-default-permissions-for-new-files-created-with-php