<h1>Calendar and Task Creator</h1>
    <div class="navigation-text">Click the arrows to switch between months</div>
    <div class="navigation-text">Click the dates to create tasks</div>
    <?php

    $month = isset($_GET['month']) ? $_GET['month'] : date('n');
    $year = isset($_GET['year']) ? $_GET['year'] : date('Y');

    // Links
    $prevMonth = ($month == 1) ? 12 : $month - 1;
    $prevYear = ($month == 1) ? $year - 1 : $year;
    $nextMonth = ($month == 12) ? 1 : $month + 1;
    $nextYear = ($month == 12) ? $year + 1 : $year;

    echo "<div class='navigation'>";
    echo "<a href='index.php?month=$prevMonth&year=$prevYear'><</a>";
    echo "<span>  |  </span>";
    echo "<a href='index.php?month=$nextMonth&year=$nextYear'>></a>";
    echo "</div>";

    // number of days 
    $numDays = cal_days_in_month(CAL_GREGORIAN, $month, $year);
    $firstDay = mktime(0, 0, 0, $month, 1, $year);

    $monthName = date('F', $firstDay);

    //day of the week for the first day of the month
    $dayOfWeek = date('D', $firstDay);

    $daysOfWeek = array('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');
    $firstDayIndex = array_search($dayOfWeek, $daysOfWeek);


    // Display 
    echo "<h2>$monthName $year</h2>";
    echo "<table>";
    echo "<tr>";
    foreach ($daysOfWeek as $day) {
        echo "<th>$day</th>";
    }
    echo "</tr>";
    echo "<tr>";
    $dayCount = 1;
    for ($i = 0; $i < $firstDayIndex; $i++) {
        echo "<td></td>";
    }
    while ($dayCount <= $numDays) {
        for ($i = $firstDayIndex; $i < 7; $i++) {
            if ($dayCount <= $numDays) {
                echo "<td><a href='form.php?day=$dayCount&month=$month&year=$year'>$dayCount</a></td>";
                $dayCount++;
            } else {
                echo "<td></td>";
            }
        }
        echo "</tr>";
        if ($dayCount <= $numDays) {
            echo "<tr>";
        }
        $firstDayIndex = 0;
    }
    echo "</table>";
// ** Here is where I'm unsure what to do **
    // printing tasks
  $task_name=$_GET['task_name'];
  $day=$_GET['day'];
  $month=$_GET['month'];
  $year=$_GET['year'];
    $tasks = array(
      array(
          'name' => '$task_name', 
          'day' => $day, 
          'month' => $month, 
          'year' => $year
      ),
    );
    
    // Display 
    echo "<h2>Tasks</h2>";
    echo "<table>";
    echo "<tr><th>Task Name</th><th>Date</th></tr>";
    foreach ($tasks as $task) {
        echo "<tr>";
        echo "<td>{$task_name}</td>";
        echo "<td>{$task['day']}/{$task['month']}/{$task['year']}</td>";
        echo "</tr>";
    }
    echo "</table>";
    ?>

The problem is when I enter more than one form, only the latest task is displayed. I’m not sure if I have to store it in a database or if there’s another way of doing it.

I tried to make it so that if the task name is different than the first one, I added a new array to the $tasks but it still only displayed the 2nd task as the variable $task_name is still the same for both.