[英]how to check two dates between from-date and to-date
I have two dates from-date
& to-date
. 我有两个约会from-date
和to-date
。
I have to compare them from existing dates shown below, whether any of the day fall between them or not using php? 我必须将它们与下面显示的现有日期进行比较,是否有任何一天落在他们之间或不使用PHP?
i can do for single date checking ,but i am confuse for the two date checking. 我可以做单日期检查,但我很困惑两个日期检查。
Example: i have to check these dates:-> from= 15 March 2013
& 15 April 2013
between the following dates whether any days falls in between these two date or not. 示例:我必须检查这些日期: - >从15 March 2013
15 April 2013
以下日期之间是否有任何天数介于这两个日期之间。
# from date to-date
-----------------------------------------
1 01 April 2013 30 April 2013 //here we will find as falling
2 01 May 2013 15 May 2013
3 01 June 2013 20 June 2013
Currently,in my mind not even a single logic is coming to try. 目前,在我看来,甚至没有一个逻辑可以尝试。 Please give me any logic or suggestions regarding this issue.. 请告诉我有关此问题的任何逻辑或建议。
The simplest way to compare dates is to convert them to a unix timestamp 比较日期的最简单方法是将它们转换为unix时间戳
Because the unix timestamp is an integer, you can simply use relational operators to compare them. 因为unix时间戳是一个整数,所以你可以简单地使用关系运算符来比较它们。
Example 例
// set some example data
$referenceDate = '01 April 2013';
$fromDate = '01 January 2013';
$toDate = '01 June 2013';
// convert dates to timestamps (strings to integers)
$referenceTimestamp = strtotime( $referenceDate );
$fromTimestamp = strtotime( $fromDate );
$toTimestamp = strtotime( $toDate );
// isBetween is Boolean TRUE if reference date is greater or equal fromDate and smaller or equal toDate
$isBetween = $referenceTimestamp >= $fromTimestamp and $referenceTimestamp <= $toTimestamp;
EDIT 1 编辑1
To actually answer your question: 要真正回答你的问题:
You have two ranges you need to test for overlap, this question has been answered here What's the most efficient way to test two integer ranges for overlap? 你需要测试重叠的两个范围,这里已经回答了这个问题。 测试两个重叠范围的最有效方法是什么?
// our two ranges overlap if the following conditions are met
$dateRangeOverlaps = $referenceFromTimestamp <= $toTimestamp and $fromTimestamp <= $referenceToTimestamp;
Please try the code, 请试试代码,
$ourdate = strtotime('1 April 2013'); // Your date which is to be checked
$from = strtotime('15 March 2013'); // From date
$to = strtotime('15 April 2013'); // To date
if ($ourdate >= $from && $ourdate <= $to)
{
echo "Date falls";
}
else
{
echo "No Date falls";
}
If you need to check several dates, pass it as an array, like below... 如果您需要检查几个日期,请将其作为数组传递,如下所示...
$i=0;
$dates= array("11 April 2013","16 April 2013");
foreach($dates as $ourdates)
{
$ourdate= strtotime($ourdates); //Your dates to be checked
$from = strtotime('15 March 2013'); // From date
$to = strtotime('15 April 2013'); // To date
if ($ourdate >= $from && $ourdate <= $to)
{
$i++;
}
}
if($i>0)
{
echo "Date falls";
}
else
{
echo "No Date falls";
}
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