时间差文字处理函数

分享一个时间戳和当前时间差值处理的函数，用于返回‘刚刚’，‘X分钟前’，‘x小时前’……

if (!function_exists('getDateDiff')) {
  /**
   * PHP 时间戳差值文字处理
   * @param  [type] $dateTimeStamp [ 待处理数据时间戳 ]
   * @return [type]          [ 返回时间差值文字 ]
   *
   * demo
   * echo getDateDiff(time()-3600);
   */
  function getDateDiff($dateTimeStamp) {
        $minute = 60;
        $hour = $minute * 60;
        $day = $hour * 24;
        $halfamonth = $day * 15;
        $month = $day * 30;
        $now = time();

        // 计算时间差
        $diffValue = $now - $dateTimeStamp;

        if ($diffValue < 0) {
            return;
        }
        $monthC = $diffValue / $month;
        $weekC = $diffValue / (7 * $day);
        $dayC = $diffValue / $day;
        $hourC = $diffValue / $hour;
        $minC = $diffValue / $minute;
        $result = '';

        if ($monthC >= 1) {
            $result = intval($monthC)."月前";
        } else if ($weekC >= 1) {
            $result = intval($weekC)."周前";
        } else if ($dayC >= 1) {
            $result = intval($dayC)."天前";
        } else if ($hourC >= 1) {
            $result = intval($hourC)."小时前";
        } else if ($minC >= 1) {
            $result = intval($minC)."分钟前";
        } else {
            $result = "刚刚";
        }

        return $result;
    }
}