@since: 2.5.0

Checks if a file or directory is writable.

Checks if resource is a directory.

Checks if a file is readable.

Checks if a file or directory exists.

Checks if resource is a file.

Moves a file.

Deletes a file or directory.

Copies a file.

Gets the file’s group.

Gets the permissions of the specified file or filepath in their octal format.

Gets the file owner.

Changes filesystem permissions.

Changes current directory.

Gets the current working directory.

Writes a string to a file.