Question

I need to change the CSS on a webpage based on a query string in the URL… but I’m new to PHP and havn’t been able to find sufficient examples on how to do it.

Basically when a user clicks on a menu link, and is then sent to an “aboutUs.php” page, I need the CSS on the aboutUs.php page to change based on the string query.

Answer 1

If I understand what you want correctly:

if (isset($_GET['query'])){
$query = $_GET['query'];
}else{
$query = NULL;
}

Then something like this:

if ($query == 'x'){
echo "
<style>
Whatever style you need...
</style>
";
}elseif ($query == 'y'){
echo "
<style>
Whatever other style you need...
</style>
";
}else{
echo "
<style>
Whatever default style you need...
</style>
";
}

Of course you can echo stylesheet link instead of style tags, but the logic is the same.