Syntax:void SplDoublyLinkedList::add ($index, $newval)
Parameters:It contains two parameters as above and described below:
- $index:stores the index value at which the new element should be inserted.
- $newval:contains an element to be inserted or added.
Returned value:does not return any value.The following programs illustrate the
SplDoublyLinkedList::add()function in PHP:
Program 1:
// Declare an empty SplDoublyLinkedList
$list
=
new
SplDoublyLinkedList;
// Use the SplDoublyLinkedList::add() function for
// add elements to SplDoublyLinkedList
$list
-> add (0, 1);
$list
-> add (1,
" Geeks "
);
$list
-> add (2,
" G "
);
$list
-> add (3, 10);
print_r (
$list
);
?>
Exit:SplDoublyLinkedList Object ( [flags: SplDoublyLinkedList: private] = > 0 [dllist: SplDoublyLinkedList: private] = > Array ([0] = > 1 [1] = > Geeks [2] = > G [3] = > 10))
Program 2:
// Declare empty SplDoublyLinkedList
$list
=
new
SplDoublyLinkedList;
// Use the SplDoublyLinkedList::add() function for
// add elements to SplDoublyLinkedList
$list
-> add (0, 30);
$list
-> add (1, 20);
$list
-> add (2, 30);
$list
-> add (3,
" Geeks "
);
$list
-> add (4,
’ G’
);
print_r (
$list
);
?>
Exit:SplDoublyLinkedList Object ( [flags: SplDoublyLinkedList: private] = > 0 [dllist: SplDoublyLinkedList: private] = > Array ([0] = > 30 [1] = > 20 [2] = > 30 [3] = > Geeks [4] = > G))
Link: https://www.php.net/manual/en/spldoublylinkedlist.add.php