What potential issues can arise from using inline styles versus classes in PHP for marking time windows?

Using inline styles for marking time windows in PHP can lead to code duplication, maintenance issues, and decreased readability. It is recommended to use classes instead to promote reusability and easier maintenance of the code.

<?php
// Using classes for marking time windows
$timeWindows = [
    ['start' => '08:00', 'end' => '12:00', 'class' => 'morning'],
    ['start' => '12:00', 'end' => '18:00', 'class' => 'afternoon'],
    ['start' => '18:00', 'end' => '22:00', 'class' => 'evening']
];

foreach ($timeWindows as $window) {
    echo "<div class='{$window['class']}'>{$window['start']} - {$window['end']}</div>";
}
?>