What best practices should be followed when incorporating PHP scripts to manage CSS file selection on a website?

When incorporating PHP scripts to manage CSS file selection on a website, it is important to follow best practices to ensure security and efficiency. One approach is to use PHP to dynamically select the appropriate CSS file based on certain conditions, such as user preferences or device type. This can help streamline the website's design and improve performance by loading only the necessary CSS files. 

<?php
// Define an array of CSS files with their respective conditions
$css_files = array(
    'styles.css' => 'desktop',
    'mobile-styles.css' => 'mobile'
);

// Get the user agent to determine the device type
$user_agent = $_SERVER['HTTP_USER_AGENT'];

// Default CSS file
$selected_css = 'styles.css';

// Check if the user is using a mobile device
if (strpos($user_agent, 'Mobile') !== false) {
    $selected_css = 'mobile-styles.css';
}

// Output the selected CSS file
echo '<link rel="stylesheet" type="text/css" href="' . $selected_css . '">';
?>

Keywords

PHP CSS file selection website best practices

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