date_default_timezone_set('PRC');// 设置时区

$date1 = strtotime('2015-01-01'); //把日期转换成时间戳

$date2 = time(); //取当前时间的时间戳

$nowtime=strftime("%Y-%m-%d",$date2); //格式化输出日期

$days=round(($date1-$date2)/3600/24); //四舍五入

echo "今天是".$nowtime."";

echo "
距".strftime("%Y-%m-%d ",$date1)."还有".$days."天
";

echo "当前时间 " . date("Y-m-d h:i:s",strtotime("now")). "
";

echo "后天时间 " . date("Y-m-d h:i:s",strtotime("+2 day")). "
";

echo "下周时间 " . date("Y-m-d h:i:s",strtotime("+1 week")). "
";

echo "下月时间 " . date("Y-m-d h:i:s",strtotime("+1 month")). "
";

echo "明年时间 " . date("Y-m-d h:i:s",strtotime("+1 year")). "
";

echo "下周2天4小时2秒后的时间 " . date("Y-m-d h:i:s",strtotime("+1 week 2 days 4 hours 2 seconds")). "
";

echo "下周四时间 " . date("Y-m-d h:i:s",strtotime("next thursday")). "
";

echo "上周一时间 " . date("Y-m-d h:i:s",strtotime("last monday")). "
";

echo "2015-01-04 3天后的时间 " . date("Y-m-d h:i:s",strtotime("+3 day",strtotime('2015-01-04')));

?>