Files: wp-admin/includes/class-wp-filesystem-base.php

Gets the current working directory.

Gets the file size (in bytes).

Changes current directory.

Sets the access and modification times of a file.

Changes the file group.

Creates a directory.

Changes filesystem permissions.

Deletes a directory.

Gets the file owner.

Gets details for files in a directory or a specific file.

Gets the file’s group.

Copies a file.

Moves a file.

Deletes a file or directory.

Checks if a file or directory exists.