<?php
        header('conten-type:text/html;charset=utf-8');
        date_default_timezone_set("PRC");
    $day=date("Y-m-d"." h:i:s");
    $time=$day[3];
    if ($time>=5 && $time<10) {
        echo $day,' 早上好';
    }elseif($time>=10 && $time<13) {
        echo $day,' 中午好';
    } elseif($time>=13 && $time<18) {
        echo $day,' 下午好';
    }elseif($time>=18 && $time<22){
        echo $day.' 晚上好';
    }else{
        echo $day.' 休息时间';
    }