SplDoublyLinkedList::top()
(PHP 5 >= 5.3.0, PHP 7)
Peeks at the node from the end of the doubly linked list
说明
public SplDoublyLinkedList::top(void) : mixed
参数
此函数没有参数。
返回值
The value of the last node.
错误/异常
ThrowsRuntimeExceptionwhen the data-structure is empty.
$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);