Attempts to change the group of the file filename
to group.
Only the superuser may change the group of a file arbitrarily; other users
may change the group of a file to any group of which that user is a member.
Parameters
- filename
Path to the file.
- group
A group name or number.
Return Values
Returns TRUE
on success or FALSE
on failure.
Notes
Note: This function will not work on
remote files as the file to
be examined must be accessible via the servers filesystem.
Note: When safe mode is enabled, PHP checks whether
the files or directories you are about to operate on have the same UID (owner) as the
script that is being executed.