PHP advice with defining a GET Method

Question

I have a navigation like this:

<div class="navigation" id="<?php echo $page ?>">
    <ul>
        <li>`<a class="home" href="index">Home</a>`</li>
        <li>`<a class="training-gallery" href="training-gallery">Training Gallery</a>`</li>
        <li>`<a class="products-and-merchandise" href="products-and-merchandise">Products &amp; Merchandise</a><`/li>
        <li>`<a class="facebook-page" href="facebook-page">Personal Training on Facebook</a>`</li>
        <li>`<a class="personal-training-forum" href="client-feedback">Client Feedback</a>`</li>
        <li>`<a class="dannys-blog" href="dannys-blog">Danny's Blog</a>`</li>
    </ul>
</div>

in my page, I have put the following line of code at the top of the page of a page called training gallery:

<?php $page ='training-gallery' ?>

On my website when I inspect the element using firebug, I get a message like:

Notice: Undefined variable: page in /Applications/XAMPP/xamppfiles/htdocs/Websites/twd/dtpt/includes/navigation.php on line 1
on the link of the training gallery page.

I am assuming I need a GET method instead of this simple bit of code to say that if you are on the training-gallery page, put the name of the page training-gallery on the navigation id line in the code. by defining where the page is. Hopes this makes sense.

Answer 1

Yes, you do need a GET parameter :-)

In the link, you can specify: <a href="?page=home

and in php

<?php
$page = (isset($_GET['page'])) ? $_GET['page'] : '';

• this will check, whether the $_GET['page'] exists and if not, it will set the $page to empty string...