我从datepicker获得了一些数据:
$disabled_dates = "08/10/2017, 08/17/2017";
$start_date = "08/03/2017";
$num_of_weeks = "20";
我正在尝试根据$start_date
和$num_of_weeks
我知道这可以通过new Date()
实现,但我不确定如何解释$disabled_dates
。
答案 0 :(得分:3)
strtotime()对于这样的事情来说是一个非常有用的函数。 它接受各种自然语言和日期/时间输入。
从现在起20周
class Events_Calendar
{
public IEnumerable<Event> FutureEvents => Events.Where(e => e.End >= DateTime.Today);
}
从那天开始的20周
echo date('c',strtotime('+20 weeks'))."\n";
您在 php 中的答案:
echo date('c',strtotime('08/03/2017 +20 weeks'))."\n";
修改1:将GMT添加到所有strtotime()转换中,以避免夏令时更改日期之间的秒数问题。有些日子是23小时,有些是25日,因为夏令时。 Leap seconds在unix时间不是问题。
编辑2 : javascript :
回答$disabled_dates = "08/10/2017, 08/17/2017";
$start_date = "08/03/2017";
$num_of_weeks = "20";
$the_end = strtotime($start_date.' GMT +'.$num_of_weeks.' weeks');
//make all the disabled dates into timestamps for easy comparison later
$disabled_dates_array = array();
foreach(explode(',', $disabled_dates) as $date){
$disabled_dates_array[] = strtotime(trim($date).' GMT');
}
//now compare and delay the end date if needed
foreach($disabled_dates_array as $timestamp){
//if there was a disabled date before the end, add a day's worth of seconds
//strtotime() returns false if it can't parse the date, so make sure it's truthy
if($timestamp && $timestamp <= $the_end){
$the_end += 86400;
}
}
$enddate = date('m/d/Y',$the_end);
这里我遇到了夏令时问题
var disabled_dates = "08/10/2017, 08/17/2017";
var start_date = "08/03/2017";
var num_of_weeks = "20";
var the_end = Date.parse(start_date + ' GMT') + parseInt(num_of_weeks)*7*86400*1000;
//in javascript Date.parse is similar to php's strtotime,
//but it returns milliseconds instead of seconds
disabled_dates = disabled_dates.split(", ");
for(var i = 0, len = disabled_dates.length; i < len; i++){
disabled_dates[i] = Date.parse(disabled_dates[i] + ' GMT');
if(disabled_dates[i] && disabled_dates[i] <= the_end){
the_end += 86400000;
}
}
the_end = new Date(the_end);
var enddate = ('0' + (the_end.getUTCMonth() + 1)).substr(-2) + '/' + ('0' + the_end.getUTCDate()).substr(-2) + '/' + the_end.getUTCFullYear();
console.log(enddate);
因此,在日期结束时添加“GMT”(GMT标准时间)非常重要,否则结果可能会在一天之内消失。
This video让我们深入了解如何让时间变得复杂。
答案 1 :(得分:1)
我不确定是否有更简单的方法,但那就是我会做的:
// Put dates into array or split the string
$disabled = array(new DateTime('2012-08-01'),new DateTime('2017-09-19'));
$end_date = $date->add(new DateInterval('P'.$num_of_weeks.'D'));
$range = new DatePeriod($start_date, new DateInterval('P1D'),$end_date);
// remove disabled days
foreach($range as $date){
if(in_array($date,$disabled))
$end_date = $end_date->sub(new DateInterval('P1D'));
}
代码未经过测试但应该可以使用。如果没有,请告诉我xD。
希望有所帮助。