php返回相对时间（如：20分钟前，3天前）的方法

本文实例讲述了php返回相对时间（如：20分钟前，3天前）的方法。分享给大家供大家参考。具体如下：

    function plural($num) {
     if ($num != 1)
      return "s";
    }
    function getRelativeTime($date) {
     $diff = time() - strtotime($date);
     if ($diff<60)
      return $diff." 秒".plural($diff)." 前";
     $diff = round($diff/60);
     if ($diff<60)
      return $diff." 分钟".plural($diff)." 前";
     $diff = round($diff/60);
     if ($diff<24)
      return $diff." 小时".plural($diff)." 前";
     $diff = round($diff/24);
     if ($diff<7)
      return $diff." 天".plural($diff)." 前";
     $diff = round($diff/7);
     if ($diff<4)
      return $diff." 星期".plural($diff)." 前";
     return "on ".date("F j, Y", strtotime($date));
    }

希望本文所述对大家的php程序设计有所帮助。