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PHP SplDoublyLinkedList serialize () function

Syntax:
string SplDoublyLinkedList::serialize (void)
Parameters:This function takes no parameters.Returned value:This function returns a serialized string.The following programs illustrate the SplDoublyLinkedList function: : serialize() in PHP:Program 1:  
// 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);  
// Using the serialize() function $serialize = serialize ( $list ); echo $serialize ; ?>
Exit:
C: 19 : "SplDoublyLinkedList": 29: {i: 0;: i: 1;: i: 2;: i: 3;: i: 8;: i: 5;}
Program 2 :  
// Declare an empty SplDoublyLinkedList $list = new SplDoublyLinkedList();  
// Use the SplDoublyLinkedList::add() function
// add an item to the list $list -> add (0, "Welcome" ); $list -> add (1, " to " ); $list -> add (2, " GeeksforGeeks " ); $list -> add (3, " A " ); $list -> add (4, ’ Computer’ ); $list -> add (5, " Science " ); $list -> add (6, ’ Portal’ );  
// Using the serialize() function $serialize = serialize ( $list ); echo $serialize ; ?>
Exit:
C: 19 : "SplDoublyLinkedList": 105: {i: 0;: s: 7: "Welcome";: s: 2: "to";: s: 13: "GeeksforGeeks";: s: 1: "A";: s : 8: "Computer"; : s: 7: "Science";: s: 6: "Portal";}
Link:https://www.php.net/manual/en/spldoublylinkedlist.serialize.php

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