Get week number for given month of year for presentation on calendar – PHP

I’m creating a calendar with Sunday being the start of each week and I want to present the week number of the year before each row of dates.

This is my calendar

my calendar

How can I add week numbers like this:

This is what I need

My code:

<?php
function generate_calendar($month, $year) {
    $calendar = array();
    $days_in_month = cal_days_in_month(CAL_GREGORIAN, $month, $year);
    $first_day_of_month = date('w', strtotime("$year-$month-01"));
    $week_number = 1;
    $week = array();
    
    // Determine the week number offset
    $days_from_january_1st = strtotime("$year-01-01");
    $days_to_first_day_of_month = strtotime("$year-$month-01");
    $week_number_offset = floor(($days_to_first_day_of_month - $days_from_january_1st) / 604800);
    
    // Check if the last week of the previous month is full (7 days)
    $last_week_of_previous_month = $week_number_offset;

    if ($month > 1) {
        $previous_month = $month - 1;
        $previous_month_year = $year;

    $previous_month_year = date("Y", strtotime("-1 month" , strtotime("$year-$month-01")));
    $previous_month = date("n", strtotime("-1 month" , strtotime("$year-$month-01")));

        if ($previous_month == 0) {
            $previous_month = 12;
            $previous_month_year = $year - 1;
        }

        $days_in_previous_month = cal_days_in_month(CAL_GREGORIAN, $previous_month, $previous_month_year);
        $last_day_of_previous_month = date('w', strtotime("$previous_month_year-$previous_month-$days_in_previous_month"));
        if ($last_day_of_previous_month == 6) {
            $last_week_of_previous_month=$last_week_of_previous_month + 1;
        } else {
            // Check if the last week of the previous month only has a few days
            $last_week_of_previous_month = $last_week_of_previous_month;
        }
    }
    
    // Generate the previous month's days
    for ($i = 1; $i <= $first_day_of_month; $i++) {
        array_unshift($week, "");
    }
    
    // Generate the current month's days
    for ($i = 1; $i <= $days_in_month; $i++) {
        $week[] = $i;
        if (count($week) == 7) {
            $calendar[$week_number + $last_week_of_previous_month] = $week;
            $week_number++;
            $week = array();
        }
    }
    
    // Generate the next month's days
    $remaining_days = 7 - count($week);
    for ($i = 1; $i <= $remaining_days; $i++) {
        $week[] = '';
    }
    
    if (!empty($week)) {
        $calendar[$week_number + $last_week_of_previous_month] = $week;
    }
    
    return $calendar;
}

$year = 2022;
echo "<table>n";
echo "  <tr>n";
echo "    <th colspan='3'>$year</th>n";
echo "  </tr>n";

echo "  <tr>n";
for($i=1; $i<=12; $i++){

$month_name = date('F Y', strtotime("$year-$i-01"));
$calendar = generate_calendar($i, $year);


echo "<td>n";
echo "<table>n";
echo "  <tr>n";
echo "    <th colspan='8'>$month_name</th>n";
echo "  </tr>n";
echo "  <tr>n";
echo "    <th>Week</th>n";
echo "    <th>Sun</th>n";
echo "    <th>Mon</th>n";
echo "    <th>Tue</th>n";
echo "    <th>Wed</th>n";
echo "    <th>Thu</th>n";
echo "    <th>Fri</th>n";
echo "    <th>Sat</th>n";
echo "  </tr>n";
foreach ($calendar as $week_number => $week) {
    echo "  <tr>n";
    echo "    <td>$week_number</td>n";
    foreach ($week as $day) {
        if (empty($day)) {
            echo "    <td></td>n";
        } else {
            echo "    <td>$day</td>n";
        }
    }
    echo "  </tr>n";
}
echo "</table>n";
echo "</td>n";

if($i==3 || $i==6 || $i==9){
echo "  </tr>n";
echo "  <tr>n";
}

}

echo "  </tr>n";
echo "</table>n";

?>

Trying to add week number which counts from first week of January (if last week of previous month is not full 7 days then first week of current month start from last week of previous month), but my code only count from first week of current month.