Syntax:void SplDoublyLinkedList::offsetUnset ($index)
Parameters: this function takes one parameter $index,which contains an index value that is not set.Return value:returns no value. The following programs illustrate the function SplDoublyLinkedList::offsetUnset()in PHP:Program 1:
// Declare an empty SplDoublyLinkedList $list = new SplDoublyLinkedList;
// 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’ ); $list -> rewind ();
// Use the SplDoublyLinkedList::offsetUnset() function
// reset the value at the given index $list -> offsetUnset (0); $list -> offsetUnset (1); $list -> offsetUnset (0); $list -> offsetUnset (1); var_dump ( $list );
?> Exit:object (SplDoublyLinkedList ) # 1 (2) {["flags": "SplDoublyLinkedList": private] = > int (0) ["dllist": "SplDoublyLinkedList": private] = > array (1) {[0] = > string (5) "Geeks"}} Program 2:
// Declare an empty SplDoublyLinkedList $list = new SplDoublyLinkedList ( );
// 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 SplDoublyLinkedList::offsetUnset() function
// reset the value at the given index $list -> offsetUnset (1); $list -> offsetUnset (2); print_r ( $list );
?> Exit:SplDoublyLinkedList Object ( [flags: SplDoublyLinkedList: private] = > 0 [dllist: SplDoublyLinkedList: private] = > Array ([0] = > 1 [1] = > 3 [2] = > 5))
Link: https://www.php.net/manual/en/ spldoublylinkedlist.offsetunset.php
