I currently have a header.php page which stores all the styles and positions of my header and layout. I then have a contactus.php page which includes the header.php page.

```
-----CONTACTUS.PHP:
<?php 
    include 'header.php' 
    $classnamehere='"linkStyleTwo"'     //Here is where I want to update the value
?>

```

The main links at the top of my page are styled in a certain way using:

```
------HEADER.PHP:
<?php 
    $classnamehere= '"linkStyleOne"' ?>
    <a href="http://www.google.com" class= <?php echo $classnamehere ; ?>......

```

I want to alter the style of the link that the person has clicked, so that it pops out indicating to the person which page they are on. Currently, when I try altering the value of $classnamehere inside of contactus.php (by simply assigning it a new value) to change the class printed inside the `<a href>` tag, nothing happens. It executes the include command, and outputs the value that was stated inside header.php, ignoring my attempts to change the value on the new page. 

Is there any way to change the value within contactus.php only, while still keeping the initial value inside header.php so that all the other pages can still use the 'default' style?

Edit: Inside contactus.php, can I change the value of a variable obtained (included) from header.php without actually 'changing' the global variable?