$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
5
2
3
PHP - Manual: SplDoublyLinkedList::unshift
2024-11-15
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::unshift — Prepends the doubly linked list with an element
Prepends value
at the beginning of the doubly linked list.
value
The value to unshift.
没有返回值。
$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
5
2
3
官方地址:https://www.php.net/manual/en/spldoublylinkedlist.unshift.php