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 programs illustrate the SplDoublyLinkedList::serialize() function in PHP:



Program 1:

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<?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 serialize() function
$serialize = serialize($list);
  
echo $serialize;
?>

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Output:

C:19:"SplDoublyLinkedList":29:{i:0;:i:1;:i:2;:i:3;:i:8;:i:5;}

Program 2:

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<?php
  
// Declare an empty SplDoublyLinkedList 
$list = new SplDoublyLinkedList();
  
// Use SplDoublyLinkedList::add() function
// to add the element into 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'); 
  
// Use serialize() function
$serialize = serialize($list);
  
echo $serialize;
?>

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Output:

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";}

Reference: https://www.php.net/manual/en/spldoublylinkedlist.serialize.php




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