测试范围是否与另一个数字范围相交

Question

I have 2 range of numbers:

• $startTime to $endTime
• $offerStartTime to $offerEndTime

Each of the above variables are integers.

I want to see if the range offerStartTime to offerEndTime falls in the range startTime and endTime.

For example, if the startTime and endTime range was: 10 to 20, then the following example ranges would return true:

• offerStartTime: 5, offerEndTime: 11
• offerStartTime: 5, offerEndTime: 100
• offerStartTime: 10, offerEndTime: 15
• offerStartTime: 10, offerEndTime: 100
• offerStartTime: 12, offerEndTime: 15
• offerStartTime: 19, offerEndTime: 100

The following would return false:

• offerStartTime: 1, offerEndTime: 3
• offerStartTime: 90, offerEndTime: 100
• offerStartTime: 1, offerEndTime: 10
• offerStartTime: 20, offerEndTime: 100

How can I do this? Would ideally like answers in PHP, but pseudo code would be fine.

Answer 1

Hope this will help you out, I have tried this with all your inputs and it is working fine..

<?php

ini_set('display_errors', 1);

$startTime=10;
$endTime=20;

$startOffset=100;
$endOffset=110;

$range=range($startTime,$endTime);//getting range of time

$offsetRange=range($startOffset,$endOffset);//getting range of offset


$set=array_intersect($range, $offsetRange);//getting the intersection

if(is_array($set) && count($set)>0);
{
    if(count($set)>1)
    {
        echo "Matched";
    }
    //added this to prevent this case offerStartTime: 1, offerEndTime: 10, 
    //ranges intersection is the endTime
    elseif(count($set)==1)
    {
        if($set[0]!=$startTime)
        {
            echo "Matched";
        }
    }
}