(PHP 5, PHP 7, PHP 8)
ArrayObject::getIterator — Create a new iterator from an ArrayObject instance
Create a new Iterator (default is ArrayIterator) from an ArrayObject instance.
This function has no parameters.
An iterator from an ArrayObject.
Example #1 ArrayObject::getIterator() example
<?php
$array = [
    '1' => 'one',
    '2' => 'two',
    '3' => 'three',
];
$arrayobject = new ArrayObject($array);
$iterator = $arrayobject->getIterator();
while ($iterator->valid()) {
    echo $iterator->key() . ' => ' . $iterator->current() . "\n";
    $iterator->next();
}
?>The above example will output:
1 => one 2 => two 3 => three