Implosão Recursiva de Array PHP

multi_implosao.php

<?php
function multi_implode($array, $parent = '') {
  $ret = '';

  foreach ($array as $key => $value) {
    if (is_array($value)) {
      $ret .= multi_implode($value, $parent . $key . '=>');
    } else {
      $ret .= $parent . $key . '=>' . $value . "\n";
    }
  }

  return $ret;
}
?>