note 129141 added to function.spl-object-hash

As others have noted, this function now returns the ID, padded with zeroes. It does not produce a cryptographic hash (which is not what the name hints at, either), nor does it hide it which order the objects were created. If you wish to give your objects unique identifiers while hiding in which order they were created, you can achieve this by hashing their ID together with other predictable values: <?php function objectHash(object $object): string { return hash('sha512', $object::class . spl_object_id($object)); } ?> Here's an example usage: <?php class Person { function __construct(public string $name) {} } $anna = new Person('Anna'); $bob = new Person('Bob'); var_export(objectHash($anna)); // '077d33c1 etc. echo "\n"; var_export(objectHash($bob)); // 'ea3c1319 etc. ?> Feel free to choose another hash, or hash other values along with their ID, for it to better suit your environment. ---- Server IP: 45.112.84.4 Probable Submitter: 45.91.157.134 (proxied: 2a02:a449:c7a9:0:60eb:5c69:e2:30de) ---- Manual Page -- https://php.net/manual/en/function.spl-object-hash.php Edit -- https://main.php.net/note/edit/129141 Del: integrated -- https://main.php.net/note/delete/129141/integrated Del: useless -- https://main.php.net/note/delete/129141/useless Del: bad code -- https://main.php.net/note/delete/129141/bad+code Del: spam -- https://main.php.net/note/delete/129141/spam Del: non-english -- https://main.php.net/note/delete/129141/non-english Del: in docs -- https://main.php.net/note/delete/129141/in+docs Del: other reasons-- https://main.php.net/note/delete/129141 Reject -- https://main.php.net/note/reject/129141 Search -- https://main.php.net/manage/user-notes.php