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PHP | SplObjectStorage unserialize() Function
  • Last Updated : 23 Aug, 2019

The SplObjectStorage::unserialize() function is an inbuilt function in PHP which is used to unserialize the storage from its serialize string representation.

Syntax:

void SplObjectStorage::unserialize( $serilize )

Parameters: This function accepts a single parameter $serialize which specifies the string serialization of the storage.

Return Value: This function does not return any value.

Below programs illustrate the SplObjectStorage::unserialize() function in PHP:



Program 1:




<?php
  
$obj1 = new StdClass;
  
// Create an empty SplObjectStorage
$gfg1 = new SplObjectStorage();
$gfg1[$obj1] = "Geeks";
  
// Use unserialize() function
$gfg1->unserialize($gfg1->serialize());
print_r($gfg1);
  
?>
Output:
SplObjectStorage Object
(
    [storage:SplObjectStorage:private] => Array
        (
            [00000000494fcd4d000000001f544823] => Array
                (
                    [obj] => stdClass Object
                        (
                        )

                    [inf] => Geeks
                )

            [00000000494fcd4f000000001f544823] => Array
                (
                    [obj] => stdClass Object
                        (
                        )

                    [inf] => Geeks
                )

        )

)

Program 2:




<?php
  
$obj1 = new StdClass;
$obj2 = new StdClass;
  
// Create an empty SplObjectStorage
$gfg1 = new SplObjectStorage();
$gfg1[$obj1] = "Geeks";
  
// Create an empty SplObjectStorage
$gfg2 = new SplObjectStorage();
$gfg2[$obj1] = "GFG";
$gfg2[$obj2] = "GeeksClasses";
  
// Use unserialize() function
$gfg1->unserialize($gfg2->serialize());
var_dump(count($gfg1));
  
// Use unserialize() function
$gfg2->unserialize($gfg1->serialize());
var_dump(count($gfg2));
?>
Output:
int(3)
int(5)

Reference: https://www.php.net/manual/en/splobjectstorage.unserialize.php

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