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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