PHP算出最常用日期

date_default_timezone_set('PRC'); //默认时区     
 
echo "今天:",date("Y-m-d",time()),"
";     
 
echo "今天:",date("Y-m-d",strtotime("18 june 2008")),"
";     
 
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"))."
";   
 
echo "今年一月一时间戳:".strtotime("1 January ".date('Y',time()))