CT.*_*CT. 0 html css php mysql layout
此页面用于$_GET获取资产ID并查询mysql数据库并返回一些信息.
如果'id'与任何内容都不匹配,则不会显示任何结果,但页面看起来很好.如果'id'为null,则会发生错误.$id = $_GET["id"] or die(mysql_error()); 当发生这种情况时,它们的页面布局无法正确显示.我该如何解决？
额外的问题:如果id与数据库中的任何id不匹配或者为null,我将如何获得"找不到匹配的结果"等消息.
谢谢.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="style.css" />
<title>IT Asset</title>
</head>
<body>
<div id="page">
<div id="header">
<img src="images/logo.png" />
</div>
</div>
<div id="content">
<div id="container">
<div id="main">
<div id="menu">
<ul>
<table width="100%" border="0">
<tr>
<td><li><a href="index.php">Search Assets</a></li></td>
<td><li><a href="browse.php">Browse Assets</a></li></td>
<td><li><a href="add_asset.php">Add Asset</a></li></td>
<td> </td>
</tr>
</table>
</ul>
</div>
<div id="text">
<ul>
<li>
<h1>View Asset</h1>
</li>
</ul>
<table width="100%" border="0" cellpadding="2">
<?php
//make database connect
mysql_connect("localhost", "asset_db", "asset_db") or die(mysql_error());
mysql_select_db("asset_db") or die(mysql_error());
//get asset
$id = $_GET["id"] or die(mysql_error());
//get type of asset
$sql = "SELECT asset.type
From asset
WHERE asset.id = $id";
$result = mysql_query($sql)
or die(mysql_error());
$row = mysql_fetch_assoc($result);
$type = $row['type'];
switch ($type){
case "Server":
$sql = "
SELECT asset.id
,asset.company
,asset.location
,asset.purchase_date
,asset.purchase_order
,asset.value
,asset.type
,asset.notes
,server.manufacturer
,server.model
,server.serial_number
,server.esc
,server.user
,server.prev_user
,server.warranty
FROM asset
LEFT JOIN server
ON server.id = asset.id
WHERE asset.id = $id
";
$result = mysql_query($sql);
while($row = mysql_fetch_assoc($result))
{
echo "<tr><td> </td><td>Asset ID:</td><td>";
$id = $row['id'];
setcookie('id', $id);
echo "$id</td></tr>";
echo "<tr<td> </td><td>Company:</td><td>";
$company = $row['company'];
setcookie('company', $company);
echo "$company</td></tr>";
echo "<tr><td> </td><td>Location:</td><td>";
$location = $row['location'];
setcookie('location', $location);
echo "$location</td></tr>";
echo "<tr><td> </td><td>Purchase Date:</td><td>";
$purchase_date = $row['purchase_date'];
setcookie('purchase_date', $purchase_date);
echo "$purchase_date</td></tr>";
echo "<tr><td> </td><td>Purchase Order:</td><td>";
$purchase_order = $row['purchase_order'];
setcookie('purchase_order', $purchase_order);
echo "$purchase_order</td></tr>";
echo "<tr><td> </td><td>Value:</td><td>";
$value = $row['value'];
setcookie('value', $value);
echo "$value</td></tr>";
echo "<tr><td> </td><td>Type:</td><td>";
$type = $row['type'];
setcookie('type', $type);
echo "$type</td></tr>";
echo "<tr><td> </td><td>Notes:</td><td>";
$notes = $row['notes'];
setcookie('notes', $notes);
echo "$notes</td></tr>";
echo "<tr><td> </td><td>Manufacturer:</td><td>";
$manufacturer = $row['manufacturer'];
setcookie('manufacturer', $manufacturer);
echo "$manufacturer</td></tr>";
echo "<tr><td> </td><td>Model / Description:</td><td>";
$model = $row['model'];
setcookie('model', $model);
echo "$model</td></tr>";
echo "<tr><td> </td><td>Serial Number / Service Tag:</td><td>";
$serial_number = $row['serial_number'];
setcookie('serial_number', $serial_number);
echo "$serial_number</td></tr>";
echo "<tr><td> </td><td>Express Service Code:</td><td>";
$esc = $row['esc'];
setcookie('esc', $esc);
echo "$esc</td></tr>";
echo "<tr><td> </td><td>User:</td><td>";
$user = $row['user'];
setcookie('user', $user);
echo "$user</td></tr>";
echo "<tr><td> </td><td>Previous User:</td><td>";
$prev_user = $row['prev_user'];
setcookie('prev_user', $prev_user);
echo "$prev_user</td></tr>";
echo "<tr><td> </td><td>Warranty:</td><td>";
$warranty = $row['warranty'];
setcookie('warranty', $warranty);
echo "$warranty</td></tr>";
}
break;
case "Laptop":
$sql = "
SELECT asset.id
,asset.company
,asset.location
,asset.purchase_date
,asset.purchase_order
,asset.value
,asset.type
,asset.notes
,laptop.manufacturer
,laptop.model
,laptop.serial_number
,laptop.esc
,laptop.user
,laptop.prev_user
,laptop.warranty
FROM asset
LEFT JOIN laptop
ON laptop.id = asset.id
WHERE asset.id = $id
";
$result = mysql_query($sql);
while($row = mysql_fetch_assoc($result))
{
echo "<tr><td> </td><td>Asset ID:</td><td>";
$id = $row['id'];
setcookie('id', $id);
echo "$id</td></tr>";
echo "<tr<td> </td><td>Company:</td><td>";
$company = $row['company'];
setcookie('company', $company);
echo "$company</td></tr>";
echo "<tr><td> </td><td>Location:</td><td>";
$location = $row['location'];
setcookie('location', $location);
echo "$location</td></tr>";
echo "<tr><td> </td><td>Purchase Date:</td><td>";
$purchase_date = $row['purchase_date'];
setcookie('purchase_date', $purchase_date);
echo "$purchase_date</td></tr>";
echo "<tr><td> </td><td>Purchase Order:</td><td>";
$purchase_order = $row['purchase_order'];
setcookie('purchase_order', $purchase_order);
echo "$purchase_order</td></tr>";
echo "<tr><td> </td><td>Value:</td><td>";
$value = $row['value'];
setcookie('value', $value);
echo "$value</td></tr>";
echo "<tr><td> </td><td>Type:</td><td>";
$type = $row['type'];
setcookie('type', $type);
echo "$type</td></tr>";
echo "<tr><td> </td><td>Notes:</td><td>";
$notes = $row['notes'];
setcookie('notes', $notes);
echo "$notes</td></tr>";
echo "<tr><td> </td><td>Manufacturer:</td><td>";
$manufacturer = $row['manufacturer'];
setcookie('manufacturer', $manufacturer);
echo "$manufacturer</td></tr>";
echo "<tr><td> </td><td>Model / Description:</td><td>";
$model = $row['model'];
setcookie('model', $model);
echo "$model</td></tr>";
echo "<tr><td> </td><td>Serial Number / Service Tag:</td><td>";
$serial_number = $row['serial_number'];
setcookie('serial_number', $serial_number);
echo "$serial_number</td></tr>";
echo "<tr><td> </td><td>Express Service Code:</td><td>";
$esc = $row['esc'];
setcookie('esc', $esc);
echo "$esc</td></tr>";
echo "<tr><td> </td><td>User:</td><td>";
$user = $row['user'];
setcookie('user', $user);
echo "$user</td></tr>";
echo "<tr><td> </td><td>Previous User:</td><td>";
$prev_user = $row['prev_user'];
setcookie('prev_user', $prev_user);
echo "$prev_user</td></tr>";
echo "<tr><td> </td><td>Warranty:</td><td>";
$warranty = $row['warranty'];
setcookie('warranty', $warranty);
echo "$warranty</td></tr>";
}
break;
case "Desktop":
$sql = "
SELECT asset.id
,asset.company
,asset.location
,asset.purchase_date
,asset.purchase_order
,asset.value
,asset.type
,asset.notes
,desktop.manufacturer
,desktop.model
,desktop.serial_number
,desktop.esc
,desktop.user
,desktop.prev_user
,desktop.warranty
FROM asset
LEFT JOIN desktop
ON desktop.id = asset.id
WHERE asset.id = $id
";
$result = mysql_query($sql);
while($row = mysql_fetch_assoc($result))
{
echo "<tr><td> </td><td>Asset ID:</td><td>";
$id = $row['id'];
setcookie('id', $id);
echo "$id</td></tr>";
echo "<tr<td> </td><td>Company:</td><td>";
$company = $row['company'];
setcookie('company', $company);
echo "$company</td></tr>";
echo "<tr><td> </td><td>Location:</td><td>";
$location = $row['location'];
setcookie('location', $location);
echo "$location</td></tr>";
echo "<tr><td> </td><td>Purchase Date:</td><td>";
$purchase_date = $row['purchase_date'];
setcookie('purchase_date', $purchase_date);
echo "$purchase_date</td></tr>";
echo "<tr><td> </td><td>Purchase Order:</td><td>";
$purchase_order = $row['purchase_order'];
setcookie('purchase_order', $purchase_order);
echo "$purchase_order</td></tr>";
echo "<tr><td> </td><td>Value:</td><td>";
$value = $row['value'];
setcookie('value', $value);
echo "$value</td></tr>";
echo "<tr><td> </td><td>Type:</td><td>";
$type = $row['type'];
setcookie('type', $type);
echo "$type</td></tr>";
echo "<tr><td> </td><td>Notes:</td><td>";
$notes = $row['notes'];
setcookie('notes', $notes);
echo "$notes</td></tr>";
echo "<tr><td> </td><td>Manufacturer:</td><td>";
$manufacturer = $row['manufacturer'];
setcookie('manufacturer', $manufacturer);
echo "$manufacturer</td></tr>";
echo "<tr><td> </td><td>Model / Description:</td><td>";
$model = $row['model'];
setcookie('model', $model);
echo "$model</td></tr>";
echo "<tr><td> </td><td>Serial Number / Service Tag:</td><td>";
$serial_number = $row['serial_number'];
setcookie('serial_number', $serial_number);
echo "$serial_number</td></tr>";
echo "<tr><td> </td><td>Express Service Code:</td><td>";
$esc = $row['esc'];
setcookie('esc', $esc);
echo "$esc</td></tr>";
echo "<tr><td> </td><td>User:</td><td>";
$user = $row['user'];
setcookie('user', $user);
echo "$user</td></tr>";
echo "<tr><td> </td><td>Previous User:</td><td>";
$prev_user = $row['prev_user'];
setcookie('prev_user', $prev_user);
echo "$prev_user</td></tr>";
echo "<tr><td> </td><td>Warranty:</td><td>";
$warranty = $row['warranty'];
setcookie('warranty', $warranty);
echo "$warranty</td></tr>";
}
break;
}
?>
</table>
<br />
<br />
<table width="100%" border="0">
<tr>
<td> </td>
<td> </td>
<td> </td>
<td><a href="#">Add Software</a></td>
<td><a href="#">Edit Asset</a></td>
<td><a href="#">Delete Asset</a></td>
</tr>
</table>
</div>
</div>
</div>
<div class="clear"></div>
<div id="footer" align="center">
<p> </p>
</div>
</div>
<div id="tagline">
</div>
</body>
</html>
当您以这种方式集成代码和标记时,您非常有限.您应采取的方法是运行代码,处理输入并生成合适的输出,然后将其传递给知道如何输出此数据的模板.
然后,您可以在输出任何内容之前检查mysql错误,设置一个变量(如果存在)并输出用户友好的错误消息.如果没有错误,那么您可以遍历数据以显示结果.
如果你只想循环数据一次(首先通过数据集循环然后再在模板循环中构建数组),你可以将mysql结果分配给变量并以这种方式处理它(尽管你不能关闭数据库,直到完成为止).除非您尝试在企业应用程序中保存毫秒,或者拥有10个1000行的数据,否则它实际上并没有太大的区别.
无论哪种方式你选择这样做,那么只有处理这样的情况的方法是"先处理,然后呈现"...这为你提供了如何处理输出的最大灵活性.