PHP 关于时间的操作 [ 技术分享 ]

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("Ymd",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>"; 
距离某一天实现
$date1 = strtotime('2011-04-30');  //把日期转换成时间戳
 
$date2 = time(); //取当前时间的时间戳 
 
$nowtime=strftime("%y年-%m月-%d日 ",$date2); //格式化输出日期
 
$days=round(($date1-$date2)/3600/24);  //四舍五入
 
echo "今天是<font color=\"red\">".$nowtime."</font>";
 
echo "<br/>距".strftime("%y年-%m月-%d日 ",$date1)."还有<font colr=\"red\">".$days."</font>天";