使用php 获取时间今天、明天、昨天时间戳的详解

<?php  
echo "今天:".date("Y-m-d")."";      
echo "昨天:".date("Y-m-d",strtotime("-1 day")), "";      
echo "明天:".date("Y-m-d",strtotime("+1 day")). "";   
echo "一周后:".date("Y-m-d",strtotime("+1 week")). "";      
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")). "";      
echo "下个星期四:".date("Y-m-d",strtotime("next Thursday")). "";      
echo "上个周一:".date("Y-m-d",strtotime("last Monday"))."";      
echo "一个月前:".date("Y-m-d",strtotime("last month"))."";      
echo "一个月后:".date("Y-m-d",strtotime("+1 month"))."";      
echo "十年后:".date("Y-m-d",strtotime("+10 year"))."";     
strtotime()函数的作用是将日期时间描述解析为 Unix 时间戳  
int strtotime  ( string time [, int now] )  
?>