Online PHP editor | refs for BMLKD

<?php /* * Examples of DoublyLinkedList */ $obj = new SplDoublyLinkedList(); // Check wither linked list is empty if ($obj->isEmpty()) { echo "Adding nodes to Linked List "; $obj->push(2); $obj->push(3); echo "Adding the node at beginning of doubly linked list "; $obj->unshift(10); } echo " Our Linked List:"; print_r($obj); $curr = $obj->current(); // this will return NULL as we have not set initial node. echo "\r\n \r\n"; echo $obj->key(); echo "\r\n \r\n"; echo " Rewinding the position so that current node points to first node "; $obj->rewind(); echo " Current node of the linked list:"; echo $obj->current(); // this will print first node of the linked list. echo "\r\n \r\n"; echo $obj->key(); echo "\r\n \r\n"; echo " Moving to Next node:"; $obj->next(); echo " Printing the next node:"; echo $obj->current();