I'm designing a bookmarking website for a school project and it all looks fine, but when I enter my input nothing changes. i think the problem may be with sessions?

Code PHP:
<?php
session_start();
 
if(!isset($_SESSION['where'] ) ){
    $_SESSION['where'] = array();
}
                    function save($where, $title, $link, $notes){
                        $desc = school();
                        $desc['title'] = $title;
                    array_push($_SESSION[$where], $desc);
                    }
                    function show($desc) {
                        $items = $_SESSION[$school];
                        foreach($items as $item);
                            $title = $item['title'];
                            $link = $item['link'];
                            $notes = $item['notes'];
                    }
 
?>

Code HTML4Strict:
<html>
    <head>
        <link rel="stylesheet" type="text/css" href="external.css"/>
    </head>
 
    <body>
 
        <div id="header">
            <h1>Bookmarker</h1><br/>
            <div id="book"> <img src="http://www.iconshock.com/img_jpg/SEVEN/general/jpg/256/book_icon.jpg" style="height:200px;width:200px;"> 
            </div>
            </div>
 
        <div id="menu">
            <b>Menu</b><br>
            <a href='tester.php'>Main Page</a><br>
            <a href='about.php'>About Bookmarker</a></div>
 
 
        <div id="content">
                <form action='' method='GET'>
                        <center>
                            <input type="text" name="title" placeholder="Title of link"/>
                            <input type="text" name="link" placeholder="Link"/>
                            <input type="text" name="notes" placeholder="Notes/comments"/>
                    <input type="submit" value="Save!"/>
                        </center>                    
                </form>
        <div>
 
            <div id="school">
                  <p style="
                font-size:14pt;
                color:#67380E;
                font-weight:bold;
                ">
                    Saved
                </p>
Code PHP:
            <?php
            if( isset( $_SESSION['title']) && isset( $_SESSION['link']) && isset( $_SESSION['notes']))
                print("<a href=$link>$title</a><br/>$notes");
            ?>
            </div>

the website looks like this right now:
Screen Shot 2013-05-02 at 2.02.12 PM.png