我不知道这有什么问题

我试着打电话:echo PrettyTime( time() - 70 * 60 )，期待它会说1 hour ago，但它反而说70 minutes ago，我似乎不知道为什么…我认为这可能是一个舍入问题，我太笨了，找不到，但这里是我使用的代码:

  function PrettyTime( $time )
  {    
    $current = time();
    if ( $time == $current )
      return 'just now';
    if ( $time == 0 )
      return 'a long time ago';
    $time = $current - $time;
    $intervals = array
    (
      'year'   => 29030400,
      'month'  => 2592000,
      'week'   => 604800,
      'day'    => 86400,
      'hour'   => 3600,
      'minute' => 60,
      'second' => 1
    );
    foreach( $intervals as $word => $interval )
    {
      $works = intval( $time / $interval );
      $future = $works < 0;
      if ( !$works )
        continue; /* keep going through, silly! */
      else
      {
        if ( !$future && $works == 1 )
        {
          switch( $word )
          {
            case 'year':  return 'last year';
            case 'month': return 'last month';
            case 'week':  return 'last week';
            case 'day':   return 'yesterday';
            default:      break;
          }
        }
        else
          break;
      }
    }    
    return abs($works) . ' ' . $word . ( $works ? 's' : '') . ($future ? ' in the future' : ' ago');
  }