PHP处理日期和时间小整合

date_default_timezone_set(\'PRC\'); //默认时区
$t = time();
$today=date(\"Y-m-d\",time());
echo \"今天：$today<br />\";
echo \"某一天：\".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 \"<br />=======================================================<br /><br />\";
$w = date(\"w\",time()); //获取今天是本周周几
echo \"今天是星期$w<br />\";
$d=array(\"日\",\"一\",\"二\",\"三\",\"四\",\"五\",\"六\");
$whatday=\"星期\".$d[date(\"w\",strtotime($today))]; //获取今天星期几
echo \"今天是$whatday<br />\";
$d0 = date(\"Y-m-d\",strtotime(\"-$w day\",$t)); //周开始
echo \"本周周日是：$d0<br />\";
$d6 = date(\"Y-m-d\",strtotime((6-$w).\" day\",$t)); //周结束
echo \"本周周六是：$d6<br />\";

echo \"本周周日是：\".date(\"Y-m-d\",strtotime(\"Sunday\")).\"<br />\"; //周开始
echo \"本周周六是：\".date(\"Y-m-d\",strtotime(\"Saturday\")).\"<br />\"; //周结束
echo \"上周周日是：\".date(\"Y-m-d\",strtotime(\"last Sunday\")).\"<br />\"; //上周开始
echo \"上周周六是：\".date(\"Y-m-d\",strtotime(\"last Saturday\")).\"<br />\"; //上周结束
echo \"<br />=======================================================<br /><br />\";
$time = abs((strtotime(\"2012-12-21\") - strtotime(date(\"Y-m-d\")))/86400);//获取两个日期之间的天数差
echo \"距离世界末日还有：$time 天<br />\"; //上周结束
//该片段来自于http://outofmemory.cn