这个php文件哪里异常，居然无法运行，这是书本配套的代码啊抓狂

这个php文件哪里错误，居然无法运行，这是书本配套的代码啊。抓狂
config.php 文件数据库用户名和密码是正确的。

<br /><?php<br />error_reporting(E_ALL & ~E_NOTICE);<br />$dbhost = 'localhost';<br />$dbuser = 'root';<br />$dbpass = 'password123';<br />$dbname = 'chap2';<br /><br />header('content-type:text/html; charset=gbk');<br />mysql_connect($dbhost, $dbuser, $dbpass);<br />mysql_select_db($dbname);<br />mysql_query('SET NAMES gbk');<br />?>

chap2.php的代码如下：运行显示空白，到底哪里错了？？？

<br /><br /><br /><meta http-equiv="Content-Type" content="text/html; charset=GBK"><br /><title>我的书架</title><br /><style type="text/css"><br />a {<br />	text-decoration: none;<br />}<br />body {<br />	text-align: center;<br />}<br />#wrap{<br />	text-align: left;<br />	margin: 0 auto;<br />	width: 800px;<br />}<br /></style><br /><br /><body><br /><div id="wrap"><br /><h2>我的书架</h2><br /><?php<br />require_once 'config.php';<br /><br />$bookid = $_GET['edit'];<br /><br />if ($_POST['submit']) {<br />$title = $_POST['title'];<br />$author = $_POST['author'];<br />$dateline = $_POST['dateline'];<br />$price = $_POST['price'];<br /><br />$setSQL = "bookid='$bookid',title='$title',author='$author',dateline='$dateline',price='$price'";<br />$sql = $bookid ? "UPDATE books SET $setSQL WHERE bookid='$bookid'" : "INSERT INTO books SET $setSQL";<br />mysql_query($sql);<br />header('location:?');<br />exit;<br />}<br /><br />if ($bookid) {<br />$rs = mysql_query("SELECT * FROM books WHERE bookid='$bookid'");<br />$book = mysql_fetch_assoc($rs);<br />}<br /><br /><div>本文#来源gaodai.ma#com搞##代!^码7网</div><pre>搞代gaodaima码

if ($delid = $_GET[‘del’]) {
mysql_query(“DELETE FROM books WHERE bookid=’$delid'”);
}

$rs = mysql_query(“SELECT * FROM books”);

echo ‘