//取出当前日期的前一天
//注意,参数变量$xsrq必须为格式2000.10.23
//这是我以前写的一个方法,你可以参考一下
//我又特别给你注释一下,以前不带注释的
function lastdate($xsrq) {
//以“.”号(如果你的时间格式为2000-10-23,你也可以
//以“-”分割)为分割,获得数组
$pieces = explode(".", $xsrq);
//处理日期格式(如:08处理为8)
$iday = intval($pieces[2]);
//当前日期减1,你需要的是加50
$day = $iday -1;
//获取月
$month = intval($pieces[1]);
//获取年
$year = $pieces[0];//处理时间格式,算了,你自己看吧,我现在也不做PHP了,现在做JSP
$ilastday = date( "m-d-Y", mktime(0,0,0,$month,$day,$year) );
$pies = explode("-",$ilastday);
$lday = intval($pies[1]);
$lmonth = intval($pies[0]);
$lyear = intval($pies[2]);
$lastday = trim($lyear).".".trim($lmonth).".".trim($lday);
return($lastday);
}
//注意,参数变量$xsrq必须为格式2000.10.23
//这是我以前写的一个方法,你可以参考一下
//我又特别给你注释一下,以前不带注释的
function lastdate($xsrq) {
//以“.”号(如果你的时间格式为2000-10-23,你也可以
//以“-”分割)为分割,获得数组
$pieces = explode(".", $xsrq);
//处理日期格式(如:08处理为8)
$iday = intval($pieces[2]);
//当前日期减1,你需要的是加50
$day = $iday -1;
//获取月
$month = intval($pieces[1]);
//获取年
$year = $pieces[0];//处理时间格式,算了,你自己看吧,我现在也不做PHP了,现在做JSP
$ilastday = date( "m-d-Y", mktime(0,0,0,$month,$day,$year) );
$pies = explode("-",$ilastday);
$lday = intval($pies[1]);
$lmonth = intval($pies[0]);
$lyear = intval($pies[2]);
$lastday = trim($lyear).".".trim($lmonth).".".trim($lday);
return($lastday);
}
//日期特殊操作控制类
//宇凡 8月15日
?>
<?
//获取"YYYY-mm-dd"格式的当前时间
function NowDate()
{
$result = date("Y")."-".date("m")."-".date("d");
return $result;
} //获取"YYYY-mm-dd HH:ii:ss"格式的当前时间
function NowDateTime()
{
$result = date("Y")."-".date("m")."-".date("d")." ".date("H").":".date("i").":".date("s");
return $result;
} //从"YYYY-mm-dd"格式的时间中提取年
function GetYear($Date)
{
$pos = strpos($Date,"-");
$result = "";
for ($i=0;$i<$pos;$i++)
{
$result = $result.$Date[$i];
}
$month = GetMonth($Date);
$day = GetDay($Date);
if (!checkdate($month,$day,$result))
{
$result = false;
}
return $result;
} //从"YYYY-mm-dd"格式的时间中提取月
function GetMonth($Date)
{
$pos1 = strpos($Date,"-");
$pos2 = strrpos($Date,"-");
$result = "";
for ($i=$pos1+1;$i<$pos2;$i++)
{
$result = $result.$Date[$i];
}
$year = GetYear($Date);
$day = GetDay($Date);
if (!checkdate($result,$day,$year))
{
$result = false;
}
return $result;
} //从"YYYY-mm-dd"格式的时间中提取日
function GetDay($Date)
{
$pos = strrpos($Date,"-");
$result = "";
for ($i=$pos+1;$i<10;$i++)
{
$result = $result.$Date[$i];
}
$year = GetYear($Date);
$month = GetDay($Date);
if (!checkdate($month,$result,$year))
{
$result = false;
}
return $result;
return $result;
} //检查闰年,返回布尔值
function CheckLeap($year)
{
$result = (($year % 4 == 0) && (($year % 100 <> 0) || ($year % 400 == 0)));
return $result;
}
//在当前日期上加天数 返回"YYYY-mm-dd"格式的时间
function AddDay($offset)
{
$year=date("Y");
$month=date("m");
$day=date("d");
for ($i=0;$i<$offset;$i++)
{
switch ($month) {
case 1:
{
if ($day==31) {
$day = 1;
$month = 2;
}
else {
$day=$day + 1;
}
}
break;
case 2:
{
if (CheckLeap($year)) {
if ($day == 29) {
$day = 1;
$month = 3;
}
else {
$day=$day + 1;
}
}
else {
if ($day == 28) {
$day = 1;
$month = 3;
}
else {
$day=$day + 1;
}
}
}
break;
case 3:
{
if ($day==31) {
$day = 1;
$month = 4;
}
else {
$day=$day + 1;
}
}
break;
case 4:
{
if ($day==30) {
$day = 1;
$month = 5;
}
else {
$day=$day + 1;
}
}
break;
case 5:
{
if ($day==31) {
$day = 1;
$month = 6;
}
else {
$day=$day + 1;
}
}
break;
case 6:
{
if ($day==30) {
$day = 1;
$month = 7;
}
else {
$day=$day + 1;
}
}
break;
case 7:
{
if ($day==31) {
$day = 1;
$month = 8;
}
else {
$day=$day + 1;
}
}
break;
case 8:
{
if ($day==31) {
$day = 1;
$month = 9;
}
else {
$day=$day + 1;
}
}
break;
case 9:
{
if ($day==30) {
$day = 1;
$month = 10;
}
else {
$day=$day + 1;
}
}
break;
case 10:
{
if ($day==31) {
$day = 1;
$month = 11;
}
else {
$day=$day + 1;
}
}
break;
case 11:
{
if ($day==30) {
$day = 1;
$month = 12;
}
else {
$day=$day + 1;
}
}
break;
case 12:
{
if ($day==31) {
$day = 1;
$month = 1;
$year = $year + 1;
}
else {
$day=$day + 1;
}
}
}
}
$result=$year."-".$month."-".$day;
return $result;
} //在当前日期上减天数 返回"YYYY-mm-dd"格式的时间
function AbateDay($offset)
{
$year=date("Y");
$month=date("m");
$day=date("d");
for ($i=0;$i<$offset;$i++)
{
switch ($month) {
case 1:
{
if ($day==1) {
$day = 31;
$month = 12;
$year = $year - 1;
}
else {
$day=$day - 1;
}
}
break;
case 2:
{
if ($day == 1) {
$day = 31;
$month = 1;
}
else {
$day=$day - 1;
}
}
break;
case 3:
{
if ($day == 1) {
if (CheckLeap($year)) {
$day = 29;
}
else {
$day = 28;
}
$month = 2;
}
else {
$day=$day - 1;
}
}
break;
case 4:
{
if ($day == 1) {
$day = 31;
$month = 3;
}
else {
$day=$day - 1;
}
}
break;
case 5:
{
if ($day == 1) {
$day = 30;
$month = 4;
}
else {
$day=$day - 1;
}
}
break;
case 6:
{
if ($day == 1) {
$day = 31;
$month = 5;
}
else {
$day=$day - 1;
}
}
break;
case 7:
{
if ($day == 1) {
$day = 30;
$month = 6;
}
else {
$day=$day - 1;
}
}
break;
case 8:
{
if ($day == 1) {
$day = 31;
$month = 7;
}
else {
$day=$day - 1;
}
}
break;
case 9:
{
if ($day == 1) {
$day = 31;
$month = 8;
}
else {
$day=$day - 1;
}
}
break;
case 10:
{
if ($day == 1) {
$day = 30;
$month = 9;
}
else {
$day=$day - 1;
}
}
break;
case 11:
{
if ($day == 1) {
$day = 31;
$month = 10;
}
else {
$day=$day - 1;
}
}
break;
case 12:
{
if ($day == 1) {
$day = 30;
$month = 11;
}
else {
$day=$day - 1;
}
}
}
}
$result=$year."-".$month."-".$day;
return $result;
} //获取当前周第一天 返回"YYYY-mm-dd"格式的时间
function FirstDayOfThisWeek()
{
$offset=date("w");
if ($offset==0)
{
$offset=7;
}
$offset--;
$result = AbateDay($offset);
return $result;
} //获取当前周最后一天 返回"YYYY-mm-dd"格式的时间
function LastDayOfThisWeek()
{
$offset=date("w");
if ($offset==0)
{
$offset=7;
}
$offset = 7 - $offset;
$result = AddDay($offset);
return $result;
}
//获取指定月的天数
function DaysAmountOfThisMonth($month,$year)
{
switch ($month) {
case 1:
$result = 31;
break;
case 2:
{
if (CheckLeap($year)) {
$result = 29;
} else {
$result = 28;
}
break;
}
case 3:
$result = 31;
break;
case 4:
$result = 30;
break;
case 5:
$result = 31;
break;
case 6:
$result = 30;
break;
case 7:
$result = 31;
break;
case 8:
$result = 31;
break;
case 9:
$result = 30;
break;
case 10:
$result = 31;
break;
case 11:
$result = 30;
break;
case 12:
$result = 31;
break;
}
return $result;
}?>
好像不是一个类呀
呵呵~~~~~~~~~~
$now=time();
$num=50;
$dt=date("Y-m-d",$now+$num*24*3600);
echo $dt;3个月后?不就是取出月份,+3,if>12,年+1
$now=date("Y-m-d",time());
$aa=explode("-",$now);
$aa[1] +=3;
if($aa[1]>12){
$aa[1] -= 12;
$aa[0]++;
}
$dt=implode("-",$aa);