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