PHP | ArrayIterator unserialize() Function

Last Updated : 20 Nov, 2019
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The ArrayIterator::unserialize() function is an inbuilt function in PHP which is used to unserialize the serialize object. Syntax: 
void ArrayIterator::unserialize( string $serialized )
Parameters: This function accepts single parameter $serialized which holds the serialize array iterator object. Return Value: This function returns the serialized ArrayIterator object of unserialized object. Below programs illustrate the ArrayIterator::unserialize() function in PHP: Program 1: php 
<?php

// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array('G', 'e', 'e', 'k', 's')
);

// Serialize the element
$serialize = serialize($arrItr); 

// Display the output
var_dump($serialize);

// Unserialize the serialize element
$unserialize = unserialize($serialize);

// Display the result
var_dump($unserialize);

?>
Output: 
string(107) "C:13:"ArrayIterator":81:{x:i:0;a:5:{i:0;s:1:"G";i:1;
s:1:"e";i:2;s:1:"e";i:3;s:1:"k";i:4;s:1:"s";};m:a:0:{}}"
object(ArrayIterator)#2 (1) {
  ["storage":"ArrayIterator":private]=>
  array(5) {
    [0]=>
    string(1) "G"
    [1]=>
    string(1) "e"
    [2]=>
    string(1) "e"
    [3]=>
    string(1) "k"
    [4]=>
    string(1) "s"
  }
}
Program 2: php 
<?php
   
// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array(
        "a" => "Geeks",
        "b" => "for",
        "c" => "Geeks"
    )
);

// Append some elements
$arrItr->append("Computer"); 
$arrItr->append("Science"); 
$arrItr->append("Portal"); 
    
// Serialize the element
$serialize = serialize($arrItr); 

// Display the output
var_dump($serialize);

// Unserialize the element
$unserialize = unserialize($serialize); 

// Display the output
var_dump($unserialize);
   
?>
Output: 
string(160) "C:13:"ArrayIterator":133:{x:i:0;a:6:{s:1:"a";s:5:"Geeks";
s:1:"b";s:3:"for";s:1:"c";s:5:"Geeks";i:0;s:8:"Computer";i:1;
s:7:"Science";i:2;s:6:"Portal";};m:a:0:{}}"
object(ArrayIterator)#2 (1) {
  ["storage":"ArrayIterator":private]=>
  array(6) {
    ["a"]=>
    string(5) "Geeks"
    ["b"]=>
    string(3) "for"
    ["c"]=>
    string(5) "Geeks"
    [0]=>
    string(8) "Computer"
    [1]=>
    string(7) "Science"
    [2]=>
    string(6) "Portal"
  }
}
Reference: https://www.php.net/manual/en/arrayiterator.unserialize.php

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