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(PHP 5 >= 5.5.0)
SplDoublyLinkedList::add — Add/insert a new value at the specified index
$index
, mixed $newval
)
Insert the value newval
at the
specified index
, shuffling the
previous value at that index (and all subsequent values)
up through the list.
index
The index where the new value is to be inserted.
newval
The new value for the index
.
没有返回值。
Throws OutOfRangeException when
index
is out of bounds or when
index
cannot be parsed as an integer.