PHP - Recursive iterator iterator

php_recursive_iterator_iterator.php

<?php
$userInput = array(
    'user' => array(
        'name' => 'Mario',
        'surname' => 'Rossi',
        'address' => array(
            'home' => 'via di qui, 23',
            'work' => 'wherever plaza',
        )
    ),
    'accounts' => array(
        'twitter'   => '@mariorossi',
        'linkedin'  => 'http://linkedin.com/mario_rossi',
        'skype'     => 'mario.rossi'
    )
);


$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($userInput));
// Get one dimensional array
print_r(iterator_to_array($iterator));
// output
/*
[
    {
        name: "Mario",
        surname: "Rossi",
        home: "via di qui, 23",
        work: "wherever plaza",
        twitter: "@mariorossi",
        linkedin: "http://linkedin.com/mario_rossi",
        skype: "mario.rossi"
    }
]
*/

$output = array();
foreach($iterator as $key => $value){
    $output[$key] = $key. ' : ' . $value. PHP_EOL;
    echo nl2br($output[$key]);
}

// output
/*
name : Mario
surname : Rossi
home : via di qui, 23
work : wherever plaza
twitter : @mariorossi
linkedin : http://linkedin.com/mario_rossi
skype : mario.rossi
*/

/**
 * Class ServerList
 */
class ServerList extends RecursiveArrayIterator{

}

/**
 * Class ServerListManager
 */
class ServerListManager extends RecursiveIteratorIterator{

}


$serverList = new ServerList(
    array(
        'server_01' => array(
            'location'      => 'eu',
            'availability'  => 1,
            'name'          => 'chopin01',
            'services'  => array(
                'http'  => 80,
                'ssh'   => 22,
            )
        ),
        'server_02' => array(
            'location'      => 'us',
            'availability'  => 1,
            'name'          => 'mozart01',
            'services'  => array(
                'http'  => 80,
                'ssh'   => 22,
            ),
        ),
        'server_03' => array(
            'location'      => 'eu',
            'availability'  => 1,
            'name'          => 'chopin02',
            'services'  => array(
                'http'  => 80,
                'ssh'   => 22,
            )
        )
    )
);

$iterator = new ServerListManager($serverList);
$output = array();
foreach($iterator as $key => $value){
    $output[$key] = $key. ' : ' . $value. PHP_EOL;
    echo nl2br($output[$key]);
}
// Output:
/*
    location : eu
    availability : 1
    name : chopin01
    http : 80
    ssh : 22

    location : us
    availability : 1
    name : mozart01
    http : 80
    ssh : 22

    location : eu
    availability : 1
    name : chopin02
    http : 80
    ssh : 22
*/