[PHP] Converter matriz em objeto

<?php
$array = array(
    'user' => array(
        'name' => 'Abimael',
        'lastname' => 'Martell',
        'phones' => array(
            'home' => '123456',
            'work' => '3213215',
        ),
    )
);

$object = json_decode(json_encode($array));
echo $object->user->phones->work; // 3213215