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我編寫了一個工作頁面，但沒有包含我現在急需的網頁響應能力！是否有一行代碼會使整個網頁響應，或者是否需要讓每個元素響應？我需要簡單的代碼來使整個網頁響應（PHP代碼）
我曾嘗試包括以下代碼，但沒有成功：
<meta name="viewport" content="width=device-width, initial-scale=1">
下面是完整的代碼：
<?php
session_start();
$customer = $_SESSION['id_login'];
$order = $_SESSION['id_login'];
if (!isset($_SESSION['mysesi']) && !isset($_SESSION['mytype'])=='customer')
{
echo "<script>window.location.assign('LoginAndReg.php')</script>";
}
?>
<?php
include("admin/php/myFunctions.php");
@mysql_connect("localhost","root","") or die("Could not connect to database");
@mysql_select_db("bookstore") or die("Could not select database");
$displayImages = "";
if((isset($_GET['cat']) ? $_GET['cat'] : '') == "children")
$sqlSelProd = @mysql_query("select * from tblproduct where prod_cat = '$_GET[cat]'") or die(mysql_error());
else if((isset($_GET['cat']) ? $_GET['cat'] : '') == "Horror")
$sqlSelProd = @mysql_query("select * from tblproduct where prod_cat = '$_GET[cat]'") or die(mysql_error());
else if((isset($_GET['cat']) ? $_GET['cat'] : '') == "Thriller")
$sqlSelProd = @mysql_query("select * from tblproduct where prod_cat = '$_GET[cat]'") or die(mysql_error());
else
$sqlSelProd = @mysql_query("select * from tblproduct") or die(mysql_error());
if(mysql_num_rows($sqlSelProd) >= 1){
while($getProdInfo = mysql_fetch_array($sqlSelProd)){
$prodNo = $getProdInfo["prod_no"];
$prodID = $getProdInfo["prod_id"];
$prodName = $getProdInfo["prod_name"];
$prodPrice = $getProdInfo["prod_price"];
$displayImages .= '<div class="col col_14 product_gallery">
<a href="productdetail.php?prodid='.$prodID.'"><img src="images/product/'.$prodNo.'.jpg" alt="Product '.$prodNo.'" width="170" height="150" /></a>
<h3>'.$prodName.'</h3>
<p class="product_price">R '.$prodPrice.'</p>
<a href="shoppingcart.php?prodid='.$prodID.'" class="add_to_cart">Add to Cart</a></div>';
}
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<!-- Responsive code -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Great selling Book Store</title>
<link href="css/slider.css" rel="stylesheet" type="text/css" />
<link rel="stylesheet" type="text/css" href="css/ddsmoothmenu.css" />
<link rel="stylesheet" type="text/css" href="css/styles.css" />
<script language="javascript" type="text/javascript">
function clearText(field)
{
if (field.defaultValue == field.value) field.value = '';
else if (field.value == '') field.value = field.defaultValue;
}
</script>
</head>
<body id="home">
<div id="main_wrapper">
<div id="main_header">
<div id="site_title"><h1><a href="#" rel="nofollow">Book Store</a></h1></div>
<div id="header_right">
<div id="main_search">
<form action="products.php" method="get" name="search_form">
<input type="text" value="Search" name="keyword" onfocus="clearText(this)" onblur="clearText(this)" class="txt_field" />
<input type="submit" name="Search" value="" alt="Search" id="searchbutton" title="Search" class="sub_btn" />
<p>Welcome, <?php echo $_SESSION['mysesi'] ?></p> <a href="logout.php"class="btn btn-primary" role="button">Log Out</a>
<?php echo $customer ?>
<?php echo $order ?>
</form>
</div>
</div> <!-- END -->
</div> <!-- END of header -->
<div id="main_menu" class="ddsmoothmenu">
<ul>
<li><a href="index.php" class="selected">Home</a></li>
<li><a href="products.php">Books</a></li>
<li><a href="shoppingcart.php">Cart</a></li>
<li><a href="checkout.php">Checkout</a></li>
<li><a href="about.php">About</a></li>
</ul>
<br style="clear: left" />
</div> <!-- end of menu -->
<div id="main_middle">
<img src="images/image_book.png" alt="Image 01" width="500" height="170" />
<h1>Great Selling book Store</h1>
<p><a href="#" rel="nofollow" target="_parent">Great Selling book Store</a> is a country wide book store.</p>
<a href="index.php" class="buy_now">Browse All books</a>
</div> <!-- END of middle -->
<div id="main_top"></div>
<div id="main">
<div id="sidebar">
<h3>Categories</h3>
<ul class="sidebar_menu">
<li><a href="index.php?cat=children">Children</a></li>
<li><a href="index.php?cat=Horror">Horror</a></li>
<li><a href="index.php?cat=Thriller">Thriller</a></li>
</ul>
</div> <!-- END of sidebar -->
<div id="content">
<h2>Products</h2>
<?php echo $displayImages; ?>
</div> <!-- END of content -->
<div class="cleaner"></div>
</div> <!-- END of main -->
<div id="main_footer">
<div class="cleaner h40"></div>
<center>
Copyright © 2048 DigitalNinja
</center>
</div> <!-- END of footer -->
</div>
<script type='text/javascript' src='js/logging.js'></script>
</body>
</html>
自適應設計是所有關於樣式表和HTML結構 - 如果你沒有從頭開始構建它了你可能會有一段糟糕的時間...但是由於您需要更新您的代碼庫以獲取已停用的'mysql_ *'擴展名，否則無論如何您都可以重新啓動。 – CD001
請仔細閱讀以下內容：http://stackoverflow.com/tags/responsive-design/info – Optimae
'select * from tblproduct where prod_cat ='$ _GET [cat]''
CD001