How does umask(0) affect the file permissions set by touch() function in PHP?

When `umask(0)` is called in PHP, it sets the umask to 0, which means that no permissions will be removed when creating new files. This can affect the file permissions set by the `touch()` function, as the default umask value might remove certain permissions. To ensure that the file permissions set by `touch()` are not affected by the umask value, you can temporarily set the umask to 0 before calling `touch()` and then restore it back to its original value.

$original_umask = umask(0);
touch('example.txt');
umask($original_umask);