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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?
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New files created in your account are given a default protection of 644 (that is, 666 - 022), which grants read and write permission to the owner of the file, and read permission to the group and others.
To change the default permissions that are set when you create a file or directory within a session or with a script, use the umask command. The syntax is similar to that of chmod (above), but use the = operator to set the default permissions.
The system default permission values are 777 ( rwxrwxrwx ) for folders and 666 ( rw-rw-rw- ) for files.
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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