<?php #[AllowDynamicProperties] class Node { public $next; // forcing dynamic property creation is key } $first = new Node(); $first->previous = $first; $first->next = $first; $cur = $first; $new = new Node(); $new->previous = $cur; $cur->next = $new; $new->next = $first; $first->previous = $new; $cur = $new; try { // Force comparison manually to trigger zend_hash_compare $first == $cur; } catch(Error $e) { echo $e->getMessage(). PHP_EOL; }
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