gistfile1.txt

	public function delete_temp_backup( $args ) {
		global $wp_filesystem;

		if ( empty( $args['slug'] ) || empty( $args['dir'] ) ) {
			return false;
		}

		$temp_backup = trailingslashit( $wp_filesystem->wp_content_dir() . "upgrade/temp-backup/{$args['dir']}/{$args['slug']}" );

		return $this->recursive_directory_delete( $temp_backup );
	}

	public function recursive_directory_delete( $source ) {
		$source = untrailingslashit( $source );
		if ( $dir = opendir( $source ) ) {
			// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition
			while ( false !== ( $file = readdir( $dir ) ) ) {
				if ( ( '.' !== $file ) && ( '..' !== $file ) ) {
					if ( is_dir( "{$source}/{$file}" ) ) {
						error_log( "recursive delete of {$source}/{$file}" );
						$this->recursive_directory_delete( "{$source}/{$file}" );
					} else {
						error_log( "unlink file: {$source}/{$file}");
						unlink( "{$source}/{$file}" );
					}
				}
			}
			$iterator = new \FilesystemIterator( $source );
			if ( ! $iterator->valid() ) { // True if directory is empty.
				error_log( "remove directory: {$source}" );
				rmdir( $source );
			}
			error_log( "close directory: {$dir}" );
			closedir( $dir );
			return true;
		}
		return false;
	}