Online PHP editor | refs for qJL37

<?php class Q extends SplQueue { } $q = new Q(); $q->enqueue('first'); $q->enqueue('second'); $q->enqueue('third'); foreach($q as $index => $value){ echo $index . " , " . $value . PHP_EOL; } var_dump($q); $out = $q->dequeue(); var_dump($q); $q->enqueue($out); var_dump($q); foreach($q as $index => $value){ echo $index . " , " . $value . PHP_EOL; } echo "===================================" . PHP_EOL; class PQ extends SplPriorityQueue{} $pq = new PQ(); $pq->insert('first', 1); $pq->insert('fifth', 5); $pq->insert('third', 3); foreach($pq as $pr => $val){ echo $pr . " - " . $val . PHP_EOL; } echo PHP_EOL; echo $pq->next();