Syntax:bool SplDoublyLinkedList::isEmpty (void)
Parameters:this function takes no parameters.
Return Value:This function returns True if the doubly linked list is empty, False otherwise.The following programs illustrate
function SplDoublyLinkedList::isEmpty()in PHP:
Program 1:
// Declare an empty SplDoublyLinkedList $list = new SplDoublyLinkedList;
// Use the isEmpty function $res = $list -> isEmpty(); var_dump ( $res );
// Use the SplDoublyLinkedList::push() function for
// add elements to SplDoublyLinkedList $list -> push (1); $list -> push (2); $list -> push (3); $list -> push (8); $list -> push (5);
// Use the isEmpty function $res = $list -> isEmpty(); var_dump ( $res );
?> Exit:bool (true ) bool (false)
Program 2:
// Declare an empty SplDoublyLinkedList $list = new SplDoublyLinkedList;
// Use the isEmpty function $res = $list -> isEmpty(); var_dump ( $res );
// 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’ );
// Use the isEmpty function $res = $list -> isEmpty(); var_dump ( $res );
?> Exit:bool (true ) bool (false)
Link: https://www .php.net / manual / en / spldoublylinkedlist.isempty.php
