PHP ArrayIteration Previous

prev-iteration.php

<?php

$array = array('1' => 'one',
               '2' => 'two',
               '3' => 'three');
               
$arrayobject = new ArrayObject($array);

for($iterator = $arrayobject->getIterator();
    $iterator->valid();
    $iterator->next()) {

    echo $iterator->key();
    if($iterator->key() - 1 > 0) {
        echo $iterator->offsetGet($iterator->key() - 1); 
    }
}

// Outputs 1one2two3