ArrayObject getIterator() Function in PHP

Last Updated : 22 Mar, 2019
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The getIterator() function of the ArrayObject class in PHP is used to create an iterator from an ArrayObject instance. This iterator can be used to iterate through the array of the respective ArrayObject. Syntax: 
ArrayIterator getIterator()
Parameters: This function does not accepts any parameters. Return Value: This function returns an Iterator from an ArrayObject instance. Below programs illustrate the above function: Program 1: php 
<?php
// PHP program to illustrate the
// getIterator() function

$arr = array("a" => "geeks", "b" => "are", "c" => "awesome");

// Create array object
$arrObject = new ArrayObject($arr);

// Create the iterator 
$itr = $arrObject->getIterator();

// Use iterator to traverse Array
while($itr->valid()) {
    echo $itr->key().' => '.$itr->current()."\n";

    $itr->next();
}

?>
Output: 
a => geeks
b => are
c => awesome
Program 2: php 
<?php
// PHP program to illustrate the
// getIterator() function
 
$arr = array("a" => "Welcome", "b" => "2", "d" => "GFG");
 
// Create array object
$arrObject = new ArrayObject($arr);

// Create the iterator 
$itr = $arrObject->getIterator();

// Use iterator to traverse Array
while($itr->valid()) {
    echo $itr->key().' => '.$itr->current()."\n";

    $itr->next();
}

?>
Output: 
a => Welcome
b => 2
d => GFG
Reference: http://php.net/manual/en/arrayobject.getiterator.php

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