Why can't get the value of weekend in php - php

Question

I don't know what are the errors of this code because it's suddenly not accurate the showing value to the user like this:
$holidays = array();
$query_holiday = "SELECT * FROM holiday_tbl";
$result = mysqli_query($dbcon, $query_holiday);
while($row_holiday = mysqli_fetch_assoc($result))
{
array_push($row_holiday, $holidays);
}
if(strtotime(date("Y-m-d")) > strtotime($row['due_date']))
{
$currentDate = date("Y-m-d");
$days = (strtotime($currentDate) - strtotime($row['due_date'])) / 86400;
$daysTemp = $days;
for($i=1;$i<$days;$i++)
{
$currentDay = date("D", strtotime("+ ".$i." days"));
$date_loop = date("Y-m-d", strtotime("+ ".$i." days"));
if($currentDay == "Sun" || $currentDay == "Sat")
{
$daysTemp--;
}
else if(in_array($date_loop, $holidays))
{
$daysTemp--;
}
}
echo $daysTemp;
}

Answer 1

The current implementation is rather convoluted. In these cases I find it's always better to start over and try to simplify the logic as much as possible. Here is my take on your problem:
function calculate_days_late($due_date = '', $holidays = array(), $current_date = 'today') {
$days_late = 0;
// Get the timestamps for due date and current date
$current_date_ts = strtotime($current_date);
$due_date_ts = strtotime($due_date);
// If current date is not after due date then not late
if ($current_date_ts <= $due_date_ts) {
return $days_late;
}
$loop_date_ts = $current_date_ts;
while ($loop_date_ts > $due_date_ts) {
// If the looping date is not a weekend or holiday then count it
if ( ! in_array(date('D', $loop_date_ts), array('Sat','Sun'))
&& ! in_array(date('Y-m-d', $loop_date_ts), $holidays)) {
$days_late++;
}
$loop_date_ts = strtotime('-1 day', $loop_date_ts);
}
return $days_late;
}
// Test
echo '2017-09-05 = ' . calculate_days_late('2017-09-05', array(), '2017-09-05') . "\n";
echo '2017-09-06 = ' . calculate_days_late('2017-09-05', array(), '2017-09-06') . "\n";
echo '2017-09-07 = ' . calculate_days_late('2017-09-05', array(), '2017-09-07') . "\n";
echo '2017-09-08 = ' . calculate_days_late('2017-09-05', array(), '2017-09-08') . "\n";
echo '2017-09-09 = ' . calculate_days_late('2017-09-05', array(), '2017-09-09') . "\n";
echo '2017-09-10 = ' . calculate_days_late('2017-09-05', array(), '2017-09-10') . "\n";
echo '2017-09-11 = ' . calculate_days_late('2017-09-05', array(), '2017-09-11') . "\n";
echo '2017-09-12 = ' . calculate_days_late('2017-09-05', array(), '2017-09-12') . "\n";
echo '2017-09-13 = ' . calculate_days_late('2017-09-05', array(), '2017-09-13') . "\n";
Working example: https://eval.in/856018