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<?php $list = new SplDoublyLinkedList(); $list->push($a); $list->push($b); foreach($list as $a) { foreach($list as $b) { echo "($a, $b)"; } }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $a in /in/T9YpK on line 5 Warning: Undefined variable $b in /in/T9YpK on line 6 (, )(, )(, )(, )

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