PHP Manual
SplDoublyLinkedList
Add/insert a new value at the specified index

SplDoublyLinkedList::add

(PHP 5 >= 5.5.0, PHP 7)

SplDoublyLinkedList::add — Add/insert a new value at the specified index

说明

public SplDoublyLinkedList::add ( mixed $index , mixed $newval ) : void

Insert the value newval at the specified index, shuffling the previous value at that index (and all subsequent values) up through the list.

参数

index: The index where the new value is to be inserted.
newval: The new value for the index.

返回值

没有返回值。

错误／异常

Throws OutOfRangeException when index is out of bounds or when index cannot be parsed as an integer.

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