flatten multi-dimensional array

flatten multi-dimensional array.php

<?php
 /**
 *
 * @flatten multi-dimensional array
 *
 * @param array $array
 *
 * @return array
 *
 */
 function flattenArray(array $array){
  $ret_array = array();
  foreach(new RecursiveIteratorIterator(new RecursiveArrayIterator($array)) as $value)
     {
     $ret_array[] = $value;
     }
  return $ret_array;
  }