How to determine morning or afternoon in php

How to use PHP to determine whether it is morning or afternoon: first set the Chinese time zone; then define a GetDateTime method; then use the if else statement to determine whether the current time is morning or afternoon; and finally output the judgment result.

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Judge good morning and good afternoon based on the current time

    header("Content-type:text/html;charset=utf-8");
    date_default_timezone_set('PRC'); //设置中国时区 
    echo str_replace(array('AM','PM'),array('上午','下午'),date("Y-m-d A H:i:s"));

function GetDateTime(){
        $Datetime = date('H');
        $text = "";
        if($Datetime >= 0 && $Datetime < 7){
            $text = "天还没亮，夜猫子，要注意身体哦！ ";
        }else if($Datetime>=7 && $Datetime<12){
            $text = "上午好！今天天气真不错……哈哈哈，不去玩吗？"; 
        }else if($Datetime >= 12 && $Datetime < 14){
            $text = "中午好！午休时间哦，朋友一定是不习惯午睡的吧？！"; 
        }else if($Datetime >= 14 && $Datetime < 18){
            $text = "下午茶的时间到了，休息一下吧！ "; 
        }else if($Datetime >= 18 && $Datetime < 22){
            $text = "下午茶的时间到了，休息一下吧！ "; 
        }else if($Datetime >= 22 && $Datetime < 24){
            $text = "很晚了哦，注意休息呀！";
        }
        return $text;
    }

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