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PHP

Posted by Tolga CANATAN
Tolga CANATAN
8,995 Points

About 'Creating Menu and Footer' Lesson

Hi,

I started php lessons today. But, I have a problem about this lessons :

http://teamtreehouse.com/library/programming/build-a-simple-php-application/creating-the-menu-and-footer

I understand using variable and if conditional structures. I added some php codes on header.php for adding 'on' css selection. Here my header.php: 

<html>
<head>
    <title><?php echo $pageTitle; ?></title>
    <link rel="stylesheet" href="css/style.css" type="text/css">
    <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Oswald:400,700" type="text/css">
    <link rel="shortcut icon" href="favicon.ico">
</head>
<body>

    <div class="header">

        <div class="wrapper">

            <h1 class="branding-title"><a href="./">Shirts 4 Mike</a></h1>

            <ul class="nav">
                <li class="shirts <?php if($section=="shirts") {echo "on";} ?>"><a href="shirts.php">Shirts</a></li>
                <li class="contact <?php if($section=="contact") {echo "on";} ?>"><a href="contact.php">Contact</a></li>
                <li class="cart"><a href="#">Shopping Cart</a></li>
            </ul>

        </div>

    </div>

    <div id="content">

And also adding

$section = "contact"; on contact.php $section="shirts"; on shirts.php.

This codes absolutely work 'shirts' and 'contact' navigation menu for 'underlined' when I clicked (or visited these pages)

But when I go to the homepage (home.php), I got this problem:

http://j1310.hizliresim.com/1g/j/tmpft.jpg (screenshot about problem)

I added

$section="";

code on index.php php area for fix this this problem. And it's worked. But I don't understand this situtation... Can anyone help me ?

I'm sorry for my terrible English :s

Thanks.

2 Answers

Chase Lee
Chase Lee
29,275 Points

My guess is that when the server doesn't find the $section variable on the home page, it freaks out.

PHP is a very sensitive language. Unlike HTML, and CSS, and somewhat Javascript which will try to work with an error. If PHP has an error either part of the page or the whole page will not display correctly.

Hope that answers your problems.

Tolga CANATAN
Tolga CANATAN
8,995 Points
Tolga CANATAN
Tolga CANATAN
8,995 Points

Thank you. When I add $section = ""; every page, this problem solved.