(PHP) Verifying if given date is between two other dates - php

Question

I'm having an issue with some code that someone else has previously worked on.
The goal is to iterate through a directory and push any files that are within a certain date range to an array (files are in mmddyyy.txt format).
The (terribly named, not by my own doing) variables in the code represent the following:
$aYear - A given year, read in from a text file. This variable changes during every iteration of the loop. The same goes for $aMonth and $aDay.
$sYear1 - Start year. $sMonth1 and $sDay1 are used in respect to $sYear1.
$sYear2 - End year. $sMonth2 and $sDay2 are used in respect to $sYear2.
$isGood - File will be added to the array.
$isGood = false;
if($aYear >= $sYear1 && $aYear <= $sYear2)
{
if($aYear == $sYear1)
{
if($aMonth == $sMonth1)
{
if($aDay >= $sDay1 && $aDay <= $sDay2)
{
$isGood = true;
}
}
else
{
if($aMonth >= $sMonth1 && $aMonth <= $sMonth2)
{
$isGood = true;
}
}
}
else if($aYear == $sYear2)
{
if($aMonth == $sMonth2)
{
if($aDay <= $sDay2)
{
$isGood = true;
}
}
else
{
if($aMonth <= $sMonth2)
{
$isGood = true;
}
}
}
else
{
$isGood = true;
}
}
if($isGood)
{
//echo "Found good article";
$a = $a . "===" . $file;
array_push($result, $a);
}
I'm not getting the results that I expected. I'm looking for some help as to how I can simplify this code and get it working properly. I do need to keep this solution in PHP.
Thank you in advance.

Answer 1

It seems to me Month statement if($aMonth >= $sMonth1 && $aMonth <= $sMonth2) needs work
eg start date- 03 Aug 2013 end date- 04 Sep 2016 and check date say 08 Nov 2013
would make isGood=false whereas it should be true.
Removing && $aDay <= $sDay2 and && $aMonth <= $sMonth2 should work.

Answer 2

As #Sandeep pointed out you're issues are with:
if ($aMonth >= $sMonth1 && $aMonth <= $sMonth2)
and
if ($aDay >= $sDay1 && $aDay <= $sDay2)
as you don't need to be comparing the date with end dates as well.
That being said you can clear up your code completely by doing something like:
$date = (new DateTime)->setDate($aYear, $aMonth, $aDay);
$start = (new DateTime)->setDate($sYear1, $sMonth1, $sDay1);
$end = (new DateTime)->setDate($sYear2, $sMonth2, $sDay2);
if ($start <= $date && $date <= $end) {
//echo "Found good article";
$a = $a . "===" . $file;
array_push($result, $a);
}
Hope this helps!