How can PHP developers accommodate user preferences for browser settings, such as font size adjustments, without compromising the functionality of the application?

To accommodate user preferences for browser settings like font size adjustments, PHP developers can utilize CSS to create a responsive design that adapts to different font sizes. By using relative units like percentages or ems instead of fixed pixel values, the layout will adjust accordingly. Additionally, developers can provide users with options to customize font sizes through settings within the application.

<?php
// PHP code to dynamically generate CSS based on user preferences for font size
$fontSize = isset($_COOKIE['fontSize']) ? $_COOKIE['fontSize'] : '16px'; // default font size

header("Content-type: text/css");
?>

body {
    font-size: <?php echo $fontSize; ?>;
}

h1 {
    font-size: <?php echo (intval($fontSize) + 4) . 'px'; ?>;
}

p {
    font-size: <?php echo (intval($fontSize) - 2) . 'px'; ?>;
}