PHP SplDoublyLinkedList prev() Function Last Updated : 23 Jun, 2023 Summarize Comments Improve Suggest changes Share Like Article Like Report 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 <?php // Declare an empty SplDoublyLinkedList $list = new \SplDoublyLinkedList; // Use SplDoublyLinkedList::add() function to // add elements to the SplDoublyLinkedList $list->add(0, 30); $list->add(1, 20); $list->add(2, 30); $list->add(3, "Geeks"); $list->add(4, 'G'); // Use SplDoublyLinkedList::prev() function // to move to previous entry $list->prev(); // Display doubly linked list print_r($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 <?php // Declare an empty SplDoublyLinkedList $list = new \SplDoublyLinkedList(); // Use SplDoublyLinkedList::push() function to // add elements to the SplDoublyLinkedList $list->push(1); $list->push(2); $list->push(3); $list->push(8); $list->push(5); // Use SplDoublyLinkedList::prev() function // to move to previous entry $list->prev(); // Display doubly linked list var_dump($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 Comment More infoAdvertise with us Next Article PHP SplDoublyLinkedList key() Function J jit_t Follow Improve Article Tags : Web Technologies PHP PHP-function Similar Reads PHP SplDoublyLinkedList pop() Function The SplDoublyLinkedList::pop() function is an inbuilt function in PHP which is used to pop the node from the end of the doubly linked list. Syntax: mixed SplDoublyLinkedList::pop( void ) Parameters: This function does not accept any parameters. Return Value: This function returns the value of a popp 1 min read PHP SplDoublyLinkedList rewind() Function The SplDoublyLinkedList::rewind() function is an inbuilt function in PHP which is used to rewind the iterator back to the start or beginning. Syntax: void SplDoublyLinkedList::rewind( void ) Parameters: This function does not accepts any parameters. Return Value: It does not return any value. Below 1 min read PHP SplDoublyLinkedList push() Function The SplDoublyLinkedList::push() function is an inbuilt function in PHP which is used to push an element at the end of the doubly linked list. Syntax: void SplDoublyLinkedList::push( $value ) Parameters: This function accepts a single parameter $value which holds an element to push it at the end of d 1 min read PHP | SplDoublyLinkedList serialize() Function The SplDoublyLinkedList::serialize() function is an inbuilt function in PHP which is used to serializes the storage. Syntax: string SplDoublyLinkedList::serialize( void ) Parameters: This function does not accept any parameters. Return Value: This function returns the serialized string. Below progra 1 min read PHP SplDoublyLinkedList key() Function The SplDoublyLinkedList::key() function is an inbuilt function in PHP which is used to return the index of the current node. Syntax: mixed SplDoublyLinkedList::key( void ) Parameters: This function does not accepts any parameters. Return Value: It returns the index of current node. Below programs il 1 min read PHP SplDoublyLinkedList top() Function The SplDoublyLinkedList::top() function is an inbuilt function in PHP which is used to return the value of last (top) node in a doubly-linked list. Syntax: mixed SplDoublyLinkedList::top( void ) Parameters: This function does not accepts any parameters. Return Value: It returns the value of last nod 1 min read Like