WP_Filesystem_FTPext::chmod( string $file, int|false $mode = false, bool $recursive = false ): bool

263	public function chmod( $file, $mode = false, $recursive = false ) {264		if ( ! $mode ) {265			if ( $this->is_file( $file ) ) {266				$mode = FS_CHMOD_FILE;267			} elseif ( $this->is_dir( $file ) ) {268				$mode = FS_CHMOD_DIR;269			} else {270				return false;271			}272		}273 274		// chmod any sub-objects if recursive.275		if ( $recursive && $this->is_dir( $file ) ) {276			$filelist = $this->dirlist( $file );277 278			foreach ( (array) $filelist as $filename => $filemeta ) {279				$this->chmod( $file . '/' . $filename, $mode, $recursive );280			}281		}282 283		// chmod the file or directory.284		if ( ! function_exists( 'ftp_chmod' ) ) {285			return (bool) ftp_site( $this->link, sprintf( 'CHMOD %o %s', $mode, $file ) );286		}287 288		return (bool) ftp_chmod( $this->link, $mode, $file );289	}