Flatten array

Flatten array

/**
$data = array(
    'user' => array(
        'email'   => '[email protected]',
        'name'    => 'Super User',
        'address' => array(
            'billing' => 'Street 1',
            'delivery' => 'Street 2'
        )
    ),
    'post' => 'Hello, World!'
);
transform this to:
$data = array(
    'user.email' => '[email protected]',
    'user.name'  => 'Super User',
    'user.address.billing'  => 'Street 1',
    'user.address.delivery' => 'Street 2',
    'post'       => 'Hello, World!'
);
*/



/**
 * @param $array
 * @param string $prefix
 * @param string $suffix
 * @return array|null
 */
function array_flatten($array, $prefix = '', $suffix = '/')
{
    $result = array();
    if (!is_array($array)) return null; 
    foreach ($array as $key => $value) {
        if (is_array($value))
            $result = array_merge($result, array_flatten($value, $prefix . $key . $suffix, $suffix));
        else
            $result[$prefix . $key] = $value;
    }
    return $result;
}