What are some common mistakes to watch out for when implementing PHP code to switch stylesheets based on the season?

One common mistake when implementing PHP code to switch stylesheets based on the season is not properly checking the current season or not updating the season logic correctly. To avoid this, make sure to accurately determine the current season and update the stylesheet accordingly. Additionally, ensure that the code is efficient and easy to maintain.

<?php
// Determine the current season based on the month
$month = date('n');
$season = '';

if($month >= 3 && $month <= 5){
    $season = 'spring';
} elseif($month >= 6 && $month <= 8){
    $season = 'summer';
} elseif($month >= 9 && $month <= 11){
    $season = 'autumn';
} else {
    $season = 'winter';
}

// Output the appropriate stylesheet based on the season
echo '<link rel="stylesheet" type="text/css" href="' . $season . '.css">';
?>