timespan function codeigniter

<?php

$data = strtotime('01/02/2014');
$dataAtual = date('d/m/Y');

/**
 * Timespan
 *
 * Returns a span of seconds in this format:
 *  10 days 14 hours 36 minutes 47 seconds
 *
 * @access  public
 * @param integer a number of seconds
 * @param integer Unix timestamp
 * @return  integer
 */

  function timespan($seconds = 1, $time = '')
  {

    if ( ! is_numeric($seconds))
    {
      $seconds = 1;
    }

    if ( ! is_numeric($time))
    {
      $time = time();
    }

    if ($time <= $seconds)
    {
      $seconds = 1;
    }
    else
    {
      $seconds = $time - $seconds;
    }

    $str = '';
    $years = floor($seconds / 31536000);

    if ($years > 0)
    {
      $str .= $years.' '.(($years > 1) ? 'Anos' : 'Ano').', ';
    }

    $seconds -= $years * 31536000;
    $months = floor($seconds / 2628000);

    if ($years > 0 OR $months > 0)
    {
      if ($months > 0)
      {
        $str .= $months.' '.(($months > 1) ? 'Meses' : 'Mês').', ';
      }

      $seconds -= $months * 2628000;
    }

    $weeks = floor($seconds / 604800);

    if ($years > 0 OR $months > 0 OR $weeks > 0)
    {
      if ($weeks > 0)
      {
        $str .= $weeks.' '.(($weeks > 1) ? 'Semana' : 'Semanas').', ';
      }

      $seconds -= $weeks * 604800;
    }

    $days = floor($seconds / 86400);

    if ($months > 0 OR $weeks > 0 OR $days > 0)
    {
      if ($days > 0)
      {
        $str .= $days.' '.(($days > 1) ? 'Dias' : 'Dia').', ';
      }

      $seconds -= $days * 86400;
    }

    $hours = floor($seconds / 3600);

    if ($days > 0 OR $hours > 0)
    {
      if ($hours > 0)
      {
        $str .= $hours.' '.(($hours > 1) ? 'Horas' : 'Hora').', ';
      }

      $seconds -= $hours * 3600;
    }

    $minutes = floor($seconds / 60);

    if ($days > 0 OR $hours > 0 OR $minutes > 0)
    {
      if ($minutes > 0)
      {
        $str .= $minutes.' '.(($minutes > 1) ? 'Minutos' : 'Minuto').', ';
      }

      $seconds -= $minutes * 60;
    }

    if ($str == '')
    {
      $str .= $seconds.' '.(($seconds > 1) ? 'Segundos' : 'Segundo').', ';
    }

    return substr(trim($str), 0, -1);
  }



echo timespan($data, $dataAtual);