the SplStack is simply a SplDoublyLinkedList with an iteration mode IT_MODE_LIFO and IT_MODE_KEEP
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplStack 类的主要功能是通过将迭代模式设置为 SplDoublyLinkedList::IT_MODE_LIFO
来提供使用双向链表实现的栈。
示例 #1 SplStack 示例
<?php
$q = new SplStack();
$q[] = 1;
$q[] = 2;
$q[] = 3;
foreach ($q as $elem) {
echo $elem."\n";
}
?>
以上示例会输出:
3 2 1
the SplStack is simply a SplDoublyLinkedList with an iteration mode IT_MODE_LIFO and IT_MODE_KEEP
<?php//SplStack Mode is LIFO (Last In First Out) $q = new SplStack();$q[] = 1;$q[] = 2;$q[] = 3;$q->push(4);$q->add(4,5);$q->rewind();while($q->valid()){ echo $q->current(),"\n"; $q->next();}?>Output54321