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

Changes current directory.

Returns the path on the remote filesystem of WP_LANG_DIR.

Changes the file group.

Checks if resource is a file.

Checks if resource is a directory.

Checks if a file is readable.

Checks if a file or directory is writable.

Gets the file’s last access time.

Gets the file modification time.

Gets the file size (in bytes).

Sets the access and modification times of a file.

Creates a directory.

Deletes a directory.

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

Moves a file.