PHP umask() Function
Definition and Usage
The umask() function changes the current umask.
umask() sets PHP's umask to mask & 0777 and returns the original umask. When PHP is used as a server module, umask is restored after each request.
Calling umask() without parameters returns the current umask.
Syntax
umask(mask)
| Parameter | Description |
|---|---|
| mask | Required. Specifies the new permissions. The default is 0777. |
Tips and Comments
Note:Avoid using this function on multi-threaded servers. It is better to use to change the permissions of a file after it is created. chmod()Using umask() can cause unpredictable situations in concurrent programs and servers because they use the same umask.
