Util.php

<?php

/*
 * This file is part of Mandango.
 *
 * (c) Pablo Díez <pablodip@gmail.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace Mandango\MandangoBundle;

/**
 * Util.
 *
 * @author Pablo Díez <pablodip@gmail.com>
 */
class Util
{
    /*
     * code from php at moechofe dot com (array_merge comment on php.net)
     */
    static public function arrayDeepMerge()
    {
        $numArgs = func_num_args();

        if (0 == $numArgs) {
            return false;
        }

        if (1 == $numArgs) {
            return func_get_arg(0);
        }

        if (2 == $numArgs) {
            $args = func_get_args();
            $args[2] = array();
            if (is_array($args[0]) && is_array($args[1])) {
                foreach (array_unique(array_merge(array_keys($args[0]),array_keys($args[1]))) as $key) {
                    $isKey0 = array_key_exists($key, $args[0]);
                    $isKey1 = array_key_exists($key, $args[1]);

                    if (is_int($key)) {
                        if ($isKey0) {
                            $args[2][] = $args[0][$key];
                        }
                        if ($isKey1) {
                            $args[2][] = $args[1][$key];
                        }
                    } elseif ($isKey0 && $isKey1 && is_array($args[0][$key]) && is_array($args[1][$key])) {
                        $args[2][$key] = static::arrayDeepMerge($args[0][$key], $args[1][$key]);
                    } else if ($isKey0 && $isKey1) {
                        $args[2][$key] = $args[1][$key];
                    } else if (!$isKey1) {
                        $args[2][$key] = $args[0][$key];
                    } else if (!$isKey0) {
                        $args[2][$key] = $args[1][$key];
                    }
                }
                return $args[2];
            } else {
              return $args[1];
            }
        }

        $args = func_get_args();
        $args[1] = static::arrayDeepMerge($args[0], $args[1]);
        array_shift($args);

        return call_user_func_array(array(get_called_class(), 'arrayDeepMerge'), $args);
    }
}