Script to test date range overlap

overlap_test.php

<?php
echo '<pre>';
$sDate = '2016-02-03';
$eDate = '2016-02-10';
$overlapTest = [
	# start before sDate
	['2016-02-01', '2016-02-03'],
	['2016-02-01', '2016-02-02'],
	['2016-02-01', '2016-02-09'],
	['2016-02-01', '2016-02-11'],
	# start in middle range
	['2016-02-04', '2016-02-06'],
	['2016-02-04', '2016-02-10'],
	['2016-02-04', '2016-02-11'],
	# start in the end date
	['2016-02-10', '2016-02-11'],
	['2016-02-11', '2016-02-12'],
];
foreach ($overlapTest as $date){
	$cond = ($sDate <= $date[1] and $eDate >= $date[0]);
	echo "{$date[0]} - {$date[1]} = ".($cond ? 'overlap' : 'pass').PHP_EOL;
}