In what ways can breaking down complex date calculation problems into smaller functions improve code readability and maintainability in PHP?

Breaking down complex date calculation problems into smaller functions can improve code readability and maintainability in PHP by breaking the problem into smaller, more manageable parts. Each function can focus on a specific aspect of the date calculation, making the code easier to understand and maintain. Additionally, this approach allows for code reuse, as the smaller functions can be used in other parts of the application. 

function calculateDaysInMonth($month, $year) {
    return cal_days_in_month(CAL_GREGORIAN, $month, $year);
}

function calculateNextMonth($month, $year) {
    if ($month == 12) {
        $nextMonth = 1;
        $nextYear = $year + 1;
    } else {
        $nextMonth = $month + 1;
        $nextYear = $year;
    }
    
    return [$nextMonth, $nextYear];
}

// Example usage
$month = 9;
$year = 2022;

$daysInMonth = calculateDaysInMonth($month, $year);
list($nextMonth, $nextYear) = calculateNextMonth($month, $year);

echo "There are $daysInMonth days in month $month, $year. Next month is $nextMonth, $nextYear.";

Keywords

date calculation functions code readability maintainability PHP

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