5

如果我有两个变量$startDate="YYYYmmdd"和$endDate="YYYYmmdd"，请问如何获得它们之间的天数？

谢谢你。

4

7 回答 7

6

如果您使用的是 PHP 5.3，则可以使用新DateTime类：

$startDate = new DateTime("20101013");
$endDate = new DateTime("20101225");

$interval = $startDate->diff($endDate);

echo $interval->days . " until Christmas"; // echos 73 days until Christmas

如果没有，您将需要使用strtotime：

$startDate = strtotime("20101013");
$endDate = strtotime("20101225");

$interval = $endDate - $startDate;
$days = floor($interval / (60 * 60 * 24));

echo $days . " until Christmas"; // echos 73 days until Christmas
于 2010-10-13T08:18:53.013 回答
2 
$DayDiff = strtotime("2010-01-12")-strtotime("2009-12-30");
echo  date('z', $DayDiff)." Days";

这个应该是精确的，并且可以与 PHP < 5.2 一起使用

于 2010-10-13T08:17:45.023 回答
2 
<?php   
 $time1=strtotime($startDate);
    $time2=strtotime($endDate);
    $daycount=floor(($time2-$time1)/ 86400);
?>
于 2010-10-13T08:19:08.583 回答
2 
<?php
function days($date1, $date2) {
    $date1 = strtotime($date1);
    $date2 = strtotime($date2);
    return ($date2 - $date1) / (24 * 60 * 60);
}
$date1 = '20100820';
$date2 = '20100930';
echo days($date1, $date2);
?>
于 2010-10-13T08:19:13.800 回答
1

这是示例代码

$startDate = mktime(0,0,0,1,1,2010); 
$endDate = mktime(0,0,0,12,1,2010); 

$dateDiff = $date1 - $date2;
$fullDays = floor($dateDiff/(60*60*24));
echo "Differernce is $fullDays days";
于 2010-10-13T08:17:45.137 回答
1

我发现获得它们之间天数的最简单方法是将开始日期和结束日期转换为 Unix 时间戳并对它们进行减法。

然后，如果您想格式化日期，请使用 PHP 日期函数将其转换回来。

于 2010-10-13T08:19:23.057 回答
1

这是我的方法，在大多数情况下基于残酷的搜索，只是因为以秒为单位（数周、数月、数年）可能无法返回精确的结果，例如在使用闰年时。

<?php
function datediff( $timeformat, $startdate, $enddate )
{
    $unix_startdate = strtotime( $startdate ) ;
    $unix_enddate = strtotime( $enddate ) ;
    $min_date = min($unix_startdate, $unix_enddate);
    $max_date = max($unix_startdate, $unix_enddate);
    $Sd = date( "d", $unix_startdate ) ;
    $Sm = date( "m", $unix_startdate ) ;
    $Sy = date( "Y", $unix_startdate ) ;
    $Ed = date( "d", $unix_enddate ) ;
    $Em = date( "m", $unix_enddate ) ;
    $Ey = date( "Y", $unix_enddate ) ;

    $unixtimediff = $unix_enddate - $unix_startdate ;
    if ( $unixtimediff <= 0 ) return -1 ;

    switch( strtolower( $timeformat ) )
    {
         case "d": // days
         $divisor = 3600 * 24 ;
         return floor( $unixtimediff / $divisor ) + 1 ; 
         break ;
         case "w": // weeks
         $i = 0 ;
         while ( ( $min_date = strtotime("+1 DAY", $min_date) ) <= $max_date) $i++;
         return floor( $i / 7 ) ;
         break ;
         case "m": // months
         $i = $Sd != $Ed && $Sm != $Em ? 1 : 0 ;
         while ( ( $min_date = strtotime("+1 MONTH", $min_date) ) <= $max_date) $i++;
         return $i ;
         break ;
         case "q": // quaterly (3 months)
         $i = $Sd != $Ed && $Sm != $Em ? 1 : 0 ;
         while ( ( $min_date = strtotime("+3 MONTH", $min_date) ) <= $max_date) $i++;
         return $i ;
         break ;
         case "y": // year
         $i = $Sd != $Ed && $Sm != $Em ? 1 : 0 ;
         while ( ( $min_date = strtotime("+1 MONTH", $min_date) ) <= $max_date) $i++;
         return floor( $i / 12 ) ;
         break ;
    }
}

$startdate = "2014-01-01" ;
$enddate = "2015-12-31" ;
$formats = array( "d" => "days", "w" => "weeks", "m" => "months", "q" => "quaterly", "y" => "years" ) ;
foreach( $formats AS $K => $F )
echo "From $startdate to $enddate in $F format: ". datediff( "$K",  $startdate, $enddate )."<br>" ;

?>

于 2015-09-06T20:34:19.833 回答