mDate.php

  time() ? time() : intval($time);
	$t = time() - $time; //时间差 （秒）
	if ($t == 0)
		$text = '刚刚';
	elseif ($t < 60)
	$text = $t . '秒前'; // 一分钟内
	elseif ($t < 60 * 60)
	$text = floor($t / 60) . '分钟前'; //一小时内
	elseif ($t < 60 * 60 * 24)
	$text = floor($t / (60 * 60)) . '小时前'; // 一天内
	elseif ($t < 60 * 60 * 24 * 3)
	$text = floor($time/(60*60*24)) ==1 ?'昨天 ' . date('H:i', $t) : '前天 ' . date('H:i', $time) ; //昨天和前天
	elseif ($t < 60 * 60 * 24 * 30)
	$text = date('m月d日 H:i', $time); //一个月内
	elseif ($t < 60 * 60 * 24 * 365)
	$text = date('m月d日', $time); //一年内
	else
		$text = date('Y年m月d日', $time); //一年以前
	return $text;
}

/**
 * 格式化时间
 * @param  [type] $unixTime [description]
 * @return [type]           [description]
 */
function formatTime($unixTime)
{
    $showTime = date('Y', $unixTime) . "年" . date('n', $unixTime) . "月" . date('j', $unixTime) . "日";
    if (date('Y', $unixTime) == date('Y')) {
        $showTime = date('n', $unixTime) . "月" . date('j', $unixTime) . "日 " . date('H:i', $unixTime);
        if (date('n.j', $unixTime) == date('n.j')) {
            $timeDifference = time() - $unixTime + 1;
            if ($timeDifference < 30) {
                return "刚刚";
            }
            if ($timeDifference >= 30 && $timeDifference < 60) {
                return $timeDifference . "秒前";
            }
            if ($timeDifference >= 60 && $timeDifference < 3600) {
                return floor($timeDifference / 60) . "分钟前";
            }
            return date('H:i', $unixTime);
        }
        if (date('n.j', ($unixTime + 86400)) == date('n.j')) {
            return "昨天 " . date('H:i', $unixTime);
        }
    }
    return $showTime;
}