umask
    (PHP 3, PHP 4 , PHP 5)
umask -- Changes the current umask
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.