- PHP 手册
- 函数参考
- 其它基本扩展
- SPL
- 数据结构
- SplDoublyLinkedList
SplDoublyLinkedList::top
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::top — Peeks at the node from the end of the doubly linked list
说明
public SplDoublyLinkedList::top(): mixed参数
此函数没有参数。
返回值
The value of the last node.
错误／异常
Throws RuntimeException when the data-structure is empty.
User Contributed Notes 1 note
up down -4 lincoln dot du dot j at gmail dot com ¶4 years ago
$a = new SplDoublyLinkedList;
$arr=[1,2,3,4,5,6,7,8,9];
for($i=0;$i<count($arr);$i++){
$a->add($i,$arr[$i]);
}
echo "SplDoublyLinkedList array last/top value " . $a->top() ." \n";
echo "SplDoublyLinkedList array first/top value " . $a->bottom() . " \n\n";
print_r($a);
//Another Example
$spl = new SplDoublyLinkedList;
$spl->push(11);
$spl->push(2);
$spl->push(3);
$spl->push(8);
$spl->push(5);
//array last value
echo $spl->top();
echo PHP_EOL;
//Array first value
echo $spl->bottom();
echo PHP_EOL;
print_r($spl);
add a note
官方地址：https://www.php.net/manual/en/spldoublylinkedlist.top.php