PHP SplDoublyLinkedList count() function Last Updated : 23 Jun, 2023 Comments Improve Suggest changes Like Article Like Report The SplDoublyLinkedList::count() function is an inbuilt function in PHP which is used to count the number of elements present in a doubly linked list. Syntax: int SplDoublyLinkedList::count( void ) Parameters: It does not contain any parameter. Return Value: It returns the number of elements present in doubly linked list. Below programs illustrate the SplDoublyLinkedList::count() 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"); $list->add(4, 'G'); // Use SplDoublyLinkedList::count() function // to return number of elements print_r($list->count()); ?> Output: 5 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); $list->push(5); // Use SplDoublyLinkedList::count() function // to return number of elements print_r($list->count()); ?> Output: 5 Reference: https://www.php.net/manual/en/spldoublylinkedlist.count.php Comment More infoAdvertise with us Next Article PHP SplDoublyLinkedList count() function jit_t Follow Improve Article Tags : Web Technologies PHP PHP-function Similar Reads PHP SplDoublyLinkedList current() Function The SplDoublyLinkedList::current() function is an inbuilt function in PHP which is used to returns the current element of the array. Syntax: mixed SplDoublyLinkedList::current( void ) Parameters: It does not accepts any parameter. Return Value: It returns the current node value of doubly linked list 1 min read PHP | SplDoublyLinkedList __construct() Function The SplDoublyLinkedList::__construct() function is an inbuilt function in PHP which is used to create a new empty doubly linked list. Syntax: public SplDoublyLinkedList::__construct( void ) Parameters: This function does not accept any parameter. Return Value: This function does not return any value 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. 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