gistfile1.txt

<?php

function dlm_custom_update_version_filesize( $version_id, $file_path ) {
  $file_manager = new DLM_File_Manager();
  
  $filesize = $file_manager->get_file_size( $file_path );
  $hashes   = $file_manager->get_file_hashes( $file_path );
  
  update_post_meta( $version_id, '_filesize', $filesize );
  update_post_meta( $version_id, '_md5', $hashes['md5'] );
  update_post_meta( $version_id, '_sha1', $hashes['sha1'] );
  update_post_meta( $version_id, '_crc32', $hashes['crc32'] );
}