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Editorial Team
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Asked: 2026-05-14T23:37:32+00:00

This page uses $_GET to grab an asset id and query a mysql database

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This page uses $_GET to grab an asset id and query a mysql database and return some information.

If ‘id’ does not match anything, no results are displayed but the page looks fine. If ‘id’ is null an error would occur at $id = $_GET["id"] or die(mysql_error()); When this occurs, they page layout is not displayed correctly. How do I fix this?

Bonus question: How would I get a message like “No matching results found” or something when the id does not match any id in the database or is null.

Thank you. 

<!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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Asset ID:</td><td>";
    $id = $row['id'];
    setcookie('id', $id);
    echo "$id</td></tr>";
    echo "<tr<td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Company:</td><td>";
    $company = $row['company'];
    setcookie('company', $company);
    echo "$company</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Location:</td><td>";
    $location = $row['location'];
    setcookie('location', $location);
    echo "$location</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Purchase Date:</td><td>";
    $purchase_date = $row['purchase_date'];
    setcookie('purchase_date', $purchase_date);
    echo "$purchase_date</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Purchase Order:</td><td>";
    $purchase_order = $row['purchase_order'];
    setcookie('purchase_order', $purchase_order);
    echo "$purchase_order</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Value:</td><td>";
    $value = $row['value'];
    setcookie('value', $value);
    echo "$value</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Type:</td><td>";
    $type = $row['type'];
    setcookie('type', $type);
    echo "$type</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Notes:</td><td>";
    $notes = $row['notes'];
    setcookie('notes', $notes);
    echo "$notes</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Manufacturer:</td><td>";
    $manufacturer = $row['manufacturer'];
    setcookie('manufacturer', $manufacturer);
    echo "$manufacturer</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Model / Description:</td><td>";
    $model = $row['model'];
    setcookie('model', $model);
    echo "$model</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Express Service Code:</td><td>";
    $esc = $row['esc'];
    setcookie('esc', $esc);
    echo "$esc</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>User:</td><td>";
    $user = $row['user'];
    setcookie('user', $user);
    echo "$user</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Previous User:</td><td>";
    $prev_user = $row['prev_user'];
    setcookie('prev_user', $prev_user);
    echo "$prev_user</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Asset ID:</td><td>";
    $id = $row['id'];
    setcookie('id', $id);
    echo "$id</td></tr>";
    echo "<tr<td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Company:</td><td>";
    $company = $row['company'];
    setcookie('company', $company);
    echo "$company</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Location:</td><td>";
    $location = $row['location'];
    setcookie('location', $location);
    echo "$location</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Purchase Date:</td><td>";
    $purchase_date = $row['purchase_date'];
    setcookie('purchase_date', $purchase_date);
    echo "$purchase_date</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Purchase Order:</td><td>";
    $purchase_order = $row['purchase_order'];
    setcookie('purchase_order', $purchase_order);
    echo "$purchase_order</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Value:</td><td>";
    $value = $row['value'];
    setcookie('value', $value);
    echo "$value</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Type:</td><td>";
    $type = $row['type'];
    setcookie('type', $type);
    echo "$type</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Notes:</td><td>";
    $notes = $row['notes'];
    setcookie('notes', $notes);
    echo "$notes</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Manufacturer:</td><td>";
    $manufacturer = $row['manufacturer'];
    setcookie('manufacturer', $manufacturer);
    echo "$manufacturer</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Model / Description:</td><td>";
    $model = $row['model'];
    setcookie('model', $model);
    echo "$model</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Express Service Code:</td><td>";
    $esc = $row['esc'];
    setcookie('esc', $esc);
    echo "$esc</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>User:</td><td>";
    $user = $row['user'];
    setcookie('user', $user);
    echo "$user</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Previous User:</td><td>";
    $prev_user = $row['prev_user'];
    setcookie('prev_user', $prev_user);
    echo "$prev_user</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Asset ID:</td><td>";
    $id = $row['id'];
    setcookie('id', $id);
    echo "$id</td></tr>";
    echo "<tr<td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Company:</td><td>";
    $company = $row['company'];
    setcookie('company', $company);
    echo "$company</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Location:</td><td>";
    $location = $row['location'];
    setcookie('location', $location);
    echo "$location</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Purchase Date:</td><td>";
    $purchase_date = $row['purchase_date'];
    setcookie('purchase_date', $purchase_date);
    echo "$purchase_date</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Purchase Order:</td><td>";
    $purchase_order = $row['purchase_order'];
    setcookie('purchase_order', $purchase_order);
    echo "$purchase_order</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Value:</td><td>";
    $value = $row['value'];
    setcookie('value', $value);
    echo "$value</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Type:</td><td>";
    $type = $row['type'];
    setcookie('type', $type);
    echo "$type</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Notes:</td><td>";
    $notes = $row['notes'];
    setcookie('notes', $notes);
    echo "$notes</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Manufacturer:</td><td>";
    $manufacturer = $row['manufacturer'];
    setcookie('manufacturer', $manufacturer);
    echo "$manufacturer</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Model / Description:</td><td>";
    $model = $row['model'];
    setcookie('model', $model);
    echo "$model</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Express Service Code:</td><td>";
    $esc = $row['esc'];
    setcookie('esc', $esc);
    echo "$esc</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>User:</td><td>";
    $user = $row['user'];
    setcookie('user', $user);
    echo "$user</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Previous User:</td><td>";
    $prev_user = $row['prev_user'];
    setcookie('prev_user', $prev_user);
    echo "$prev_user</td></tr>";
    echo "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</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>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</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>&nbsp;</p>
                </div>
                </div>
                <div id="tagline">

                </div>


</body>
</html>
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1 Answer

  1. Editorial Team

    Your layout breaks because you “die” right in the middle of outputting HTML. Your page will output the content up to the table just after “View Asset”, then if the script dies, it will stop right there and not output a single character below. You’ll end up with a table start tag being output but not closed, nor will any of the divs, the body or html tags be closed.

    You’ll also find that you cannot use the setcookie function once any HTML has started to be output.

    I’d suggest completely separating your PHP logic and HTML output – preferably into separate files, or alternatively PHP code at the top of the file and HTML below. Do your logic and save your variables in PHP first, then output all your PHP normally, just including the appropriate variables where necessary. Something like this:

    <?php
// connect to the database and run your query here
// save results into an array, something like this:
$rows = array();
while($row = mysql_fetch_assoc($result))
{
    // processing with $row here if needed
    $rows[] = $row;
}

//rest of PHP code

?>
<!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">
<!-- rest of the opening HTML code here -->

<table width="100%" border="0" cellpadding="2">
<?php foreach ( $rows as $row ) : ?>
<tr>
    <td>Addet ID:</td>
    <td><?php echo $row['id'] ?></td>
</tr>
<tr>
...etc
</tr>
<?php endforeach; ?>
</table>

<!-- rest of the closing HTML code here -->
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