=$now_time){        //未来        $test = '';    }elseif($time>$today_time){        //今天        $diff_time = $now_time-$time;        if($diff_time<60){            $test = $diff_time.'秒前';        }elseif($diff_time<3600){            $test = intval($diff_time/60).'分钟前';        }else{            $test = intval($diff_time/3600).'小时前';        }    }elseif($time>$yesterday_time){        //昨天        $test = '昨天 '.$pre_name.' '.date('H:i',$time);    }elseif($time>$now_week_time){        //这周内        $test = '周'.$week_pre_name.' '.$pre_name.' '.date('H:i',$time);    }elseif($time>$now_year_time){        //今年        $test = date('m月d日',$time).' '.$pre_name.' '.date('H:i',$time);    }else{        //更早        $test = date('Y月m月d日',$time).' '.$pre_name.' '.date('H:i',$time);    }    return $test;}$time = time()-2;for($i=0;$i<30;$i++){    echo timespan($time);    echo '
';    $time = $time-3600*6;}//########################上面是用函数实现的//########################下面是用对象实现的define('NOW_TIME',time());define('TODAY_TIME',strtotime(date('Y-m-d',NOW_TIME)));define('YESTERDAY_TIME',TODAY_TIME-86400);$now_week = date('w',NOW_TIME);$now_week==0 && $now_week=7;define('NOW_WEEK_TIME',TODAY_TIME-($now_week-1)*86400);define('NOW_YEAR_TIME',strtotime(date('Y-01-01')));class timespan{    public $time; //要计算的时间的时间戳    const now_time=NOW_TIME;    const today_time=TODAY_TIME;    const yesterday_time = YESTERDAY_TIME;    const now_week_time = NOW_WEEK_TIME;    const now_year_time = NOW_YEAR_TIME;    function __construct($time=null)    {        !empty($time) && $this->time = $time;        $this->time = $time;    }    /**     * 返回 上午，下午，晚上，凌晨     * @param null $time     * @return string     */    function get_pre_name($time=null){        !empty($time) && $this->time = $time;        $the_day_time = strtotime(date('Y-m-d',$this->time));        $one_day_second = $this->time-$the_day_time;        if($one_day_second<3600*6){            $pre_name = '凌晨';        }elseif($one_day_second<3600*12){            $pre_name = '上午';        }elseif($one_day_second<3600*18){            $pre_name = '下午';        }else{            $pre_name = '晚上';        }        return $pre_name;    }    function get_week_name($time=null){        !empty($time) && $this->time = $time;        $the_week = date('w',$this->time);        $the_week==0 && $the_week=7;        $week_pre_name = '';        switch ($the_week){            case 1:                $week_pre_name = '一';                break;            case 2:                $week_pre_name = '二';                break;            case 3:                $week_pre_name = '三';                break;            case 4:                $week_pre_name = '四';                break;            case 5:                $week_pre_name = '五';                break;            case 6:                $week_pre_name = '六';                break;            case 7:                $week_pre_name = '日';                break;            default:                $week_pre_name = '';        }        return $week_pre_name;    }    function formate($time = null){        !empty($time) && $this->time = $time;        $test = '';        if($this->time>=self::now_time){            //未来            $test = '';        }elseif($this->time>self::today_time){            //今天            $diff_time = self::now_time-$this->time;            if($diff_time<60){                $test = $diff_time.'秒前';            }elseif($diff_time<3600){                $test = intval($diff_time/60).'分钟前';            }else{                $test = intval($diff_time/3600).'小时前';            }        }elseif($this->time>self::yesterday_time){            //昨天            $pre_name = $this->get_pre_name();            $test = '昨天 '.$pre_name.' '.date('H:i',$this->time);        }elseif($this->time>self::now_week_time){            //这周内            $pre_name = $this->get_pre_name();            $week_pre_name = $this->get_week_name();            $test = '周'.$week_pre_name.' '.$pre_name.' '.date('H:i',$this->time);        }elseif($this->time>self::now_year_time){            //今年            $pre_name = $this->get_pre_name();            $test = date('m月d日',$this->time).' '.$pre_name.' '.date('H:i',$this->time);        }else{            //更早            $pre_name = $this->get_pre_name();            $test = date('Y月m月d日',$this->time).' '.$pre_name.' '.date('H:i',$this->time);        }        return $test;    }}//调用方法$obj = new timespan();for($i=0;$i<30;$i++){    echo $obj->formate($time);    echo '
';    $time = $time-3600*6;}

 对于技术来说，写这个东西，真没技术含量，只所以贴出了，是想表明我想做产品的态度