https://www.php.net/manual/de/splobjectstorage.gethash.php
PHP: SplObjectStorage::getHash - Manual
Calculate a unique identifier for the contained objects
phpgethashmanual
https://api.drupal.org/api/drupal/core%21modules%21media_library%21src%21MediaLibraryState.php/function/MediaLibraryState%3A%3AgetHash/11.x
function MediaLibraryState::getHash | Drupal API
functiongethashdrupalapi
https://gethash.org/
gethash.org - Just a Hash
gethash.org is a simple blog about nothing and everything.
gethash