PHP前一天，后一天，上周，等日期获得方式

<?php
    date_default_timezone_set('PRC'); //默认时区  
    echo "今天:",date("Y-m-d",time()),"<br>"; 
    echo "今天:",date("Y-m-d",strtotime("18 june 2008")),"<br>";     
    echo "昨天:",date("Y-m-d",strtotime("-1 day")), "<br>";     
    echo "明天:",date("Y-m-d",strtotime("+1 day")), "<br>";     
    echo "一周后:",date("Y-m-d",strtotime("+1 week")), "<br>";     
    echo "一周零两天四小时两秒后:",date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")), "<br>";     
    echo "下个星期四:",date("Y-m-d",strtotime("next Thursday")), "<br>";     
    echo "上个周一:".date("Y-m-d",strtotime("last Monday"))."<br>";     
    echo "一个月前:".date("Y-m-d",strtotime("last month"))."<br>";     
    echo "一个月后:".date("Y-m-d",strtotime("+1 month"))."<br>";     
    echo "十年后:".date("Y-m-d",strtotime("+10 year"))."<br>";    
    echo (strtotime('2020-5-20′)-strtotime(date(“Y-m-d”)))/86400; //php判断一个日期距今天还有多少天 

        

          
        
        
        

          

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注意:如果没有第一行默认时区的话，时间不是标准的北京时间