PHP split data range to get only chunks free

Question

I have a datarange in array for entire month:

$fullrange = array(
   \"start\" => \"2019-12-01 00:00:00\",
   \"end\" => \"2019-12-31 23:59:59\"
)
<         


        

Answer 1

$startDateInTimestamp = \DateTime::createFromFormat('Y-m-d H:i:s', $fullrange['start'])->getTimestamp();
$endDateInTimestamp  = \DateTime::createFromFormat('Y-m-d H:i:s', $fullrange['end'])->getTimestamp();
function sortBy($a, $b, $value) {
    return \DateTime::createFromFormat('Y-m-d H:i:s', $a[$value])->getTimestamp() - \DateTime::createFromFormat('Y-m-d H:i:s', $b[$value])->getTimestamp();
}

function sortByStart($a, $b) 
{
    return sortBy($a, $b, 'start');
}
function sortByEnd($a, $b) 
{
    return sortBy($a, $b, 'end');
}
usort($array_activities, 'sortByStart');
$index = 0;
$final = [];
$final[0]['startDate'] = date('Y-m-d H:i:s', $startDateInTimestamp);
while (count($array_activities) > 0) {
    $array_activities = array_values($array_activities);
    $final[$index]['endDate'] = $array_activities[0]['start'];
    unset($array_activities[0]['start']);
    usort($array_activities, 'sortByEnd');
    $index++;
    $final[$index]['startDate'] = $array_activities[0]['end'];
    unset($array_activities[0]['end']);
    if(!isset($array_activities[0]['end']) && !isset($array_activities[0]['start']))     {
        unset($array_activities[0]);
    }
    usort($array_activities, 'sortByStart');
}
$final[count($final)-1]['endDate'] = date('Y-m-d H:i:s', $endDateInTimestamp);


echo "
";
print_r($final);
echo "
";