(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::unshift —Prepends the doubly linked list with an element
Prependsvalue at the beginning of the doubly linked list.
valueThe value to unshift.
No value is returned.
$dll = new SplDoublyLinkedList();$dll->push(2);$dll->push(3);$dll->unshift(5); // add 5 beginning of the array$dll->rewind();while($dll->valid()){ echo $dll->current()."\n"; $dll->next();}Output 523