WP_Filesystem_FTPext::delete( string $file, bool $recursive = false, string|false $type = false ): bool

448	public function delete( $file, $recursive = false, $type = false ) {449		if ( empty( $file ) ) {450			return false;451		}452 453		if ( 'f' === $type || $this->is_file( $file ) ) {454			return ftp_delete( $this->link, $file );455		}456 457		if ( ! $recursive ) {458			return ftp_rmdir( $this->link, $file );459		}460 461		$filelist = $this->dirlist( trailingslashit( $file ) );462 463		if ( ! empty( $filelist ) ) {464			foreach ( $filelist as $delete_file ) {465				$this->delete( trailingslashit( $file ) . $delete_file['name'], $recursive, $delete_file['type'] );466			}467		}468 469		return ftp_rmdir( $this->link, $file );470	}