SplDoublyLinkedList::add()函數是PHP中的內置函數,用於在給定索引處添加新值。
用法:
void SplDoublyLinkedList::add( $index, $newval )
參數:它包含上麵提到和下麵描述的兩個參數:
- $index:它保存要在其中插入新元素的索引值。
- $newval:它包含要插入或添加的元素。
返回值:它不返回任何值。
以下示例程序旨在說明PHP中的SplDoublyLinkedList::add()函數:
示例1:
<?php
// Declare an empty SplDoublyLinkedList
$list = new \SplDoublyLinkedList;
// Use SplDoublyLinkedList::add() function to
// add elements to the SplDoublyLinkedList
$list->add(0, 1);
$list->add(1, "Geeks");
$list->add(2, "G");
$list->add(3, 10);
print_r($list);
?>
輸出:
SplDoublyLinkedList Object
(
[flags:SplDoublyLinkedList:private] => 0
[dllist:SplDoublyLinkedList:private] => Array
(
[0] => 1
[1] => Geeks
[2] => G
[3] => 10
)
)
示例2:
<?php
// Declare an empty SplDoublyLinkedList
$list = new \SplDoublyLinkedList;
// Use SplDoublyLinkedList::add() function to
// add elements to the SplDoublyLinkedList
$list->add(0, 30);
$list->add(1, 20);
$list->add(2, 30);
$list->add(3, "Geeks");
$list->add(4, 'G');
print_r($list);
?>
輸出:
SplDoublyLinkedList Object
(
[flags:SplDoublyLinkedList:private] => 0
[dllist:SplDoublyLinkedList:private] => Array
(
[0] => 30
[1] => 20
[2] => 30
[3] => Geeks
[4] => G
)
)
參考: https://www.php.net/manual/en/spldoublylinkedlist.add.php
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注:本文由純淨天空篩選整理自jit_t大神的英文原創作品 PHP | SplDoublyLinkedList add() Function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。
