PHP SplDoublyLinkedList offsetUnset() Function
Last Updated :
23 Jun, 2023
The SplDoublyLinkedList::offsetUnset() function is an inbuilt function in PHP which is used to unset the value at given index.
Syntax:
void SplDoublyLinkedList::offsetUnset( $index )
Parameters: This function accepts a single parameter $index which holds the index value whose value to be unset.
Return Value: It does not return any value.
Below programs illustrate the SplDoublyLinkedList::offsetUnset() function in PHP:
Program 1:
<?php
$list = new \SplDoublyLinkedList;
$list ->add(0, 30);
$list ->add(1, 20);
$list ->add(2, 30);
$list ->add(3, "Geeks" );
$list ->add(4, 'G' );
$list -> rewind ();
$list ->offsetUnset(0);
$list ->offsetUnset(1);
$list ->offsetUnset(0);
$list ->offsetUnset(1);
var_dump( $list );
?>
|
Output:
object(SplDoublyLinkedList)#1 (2) {
["flags":"SplDoublyLinkedList":private]=>
int(0)
["dllist":"SplDoublyLinkedList":private]=>
array(1) {
[0]=>
string(5) "Geeks"
}
}
Program 2:
<?php
$list = new \SplDoublyLinkedList();
$list ->push(1);
$list ->push(2);
$list ->push(3);
$list ->push(8);
$list ->push(5);
$list ->offsetUnset(1);
$list ->offsetUnset(2);
print_r( $list );
?>
|
Output:
SplDoublyLinkedList Object
(
[flags:SplDoublyLinkedList:private] => 0
[dllist:SplDoublyLinkedList:private] => Array
(
[0] => 1
[1] => 3
[2] => 5
)
)
Reference: https://www.php.net/manual/en/spldoublylinkedlist.offsetunset.php
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