How can the issue of displaying one day less than the actual month in a PHP calendar be addressed?

To address the issue of displaying one day less than the actual month in a PHP calendar, we need to ensure that we are correctly setting the end date of the month. This can be achieved by using the `t` format character in the `date()` function to get the number of days in the current month. By doing so, we can correctly display all days of the month in the calendar.

// Get the current month and year
$month = date('m');
$year = date('Y');

// Get the number of days in the current month
$numDays = date('t', strtotime($year . '-' . $month . '-01'));

// Loop through each day of the month
for ($day = 1; $day <= $numDays; $day++) {
    echo $day . '<br>';
}