Description
int
umask ( [int mask] )
umask() sets PHP's umask to
mask & 0777 and returns the old
umask. When PHP is being used as a server module, the umask
is restored when each request is finished.
umask() without arguments simply returns the
current umask.
Note:
Avoid using this function in multithreaded webservers. It is better to
change the file permissions with chmod() after
creating the file. Using umask() can lead to
unexpected behavior of concurrently running scripts and the webserver
itself because they all use the same umask.
Example 1. umask() example
<?php
$old = umask(0);
chmod("/path/some_dir/some_file.txt", 0755);
umask($old);
// Checking
if ($old != umask()) {
die('An error occured while changing back the umask');
}
?>
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