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POupdating mysql data using php with a drop down option
 

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  1. POupdating mysql data using php with a drop down option
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    <p><em><strong>I am trying to update my products table using a product form but it is throwing an error for an undefined variable here is my code for the productform.php</em></strong></p> <pre><code>&lt;?php $ProductID= $_GET['ProductID']; //Connect and select a database mysql_connect ("localhost", "root", ""); mysql_select_db("supplierdetails"); { $result = mysql_query("SELECT * FROM products WHERE ProductID=$ProductID"); while($row = mysql_fetch_array($result)) { $ProductID= $_GET['ProductID']; $ProdDesc = $row['ProdDesc']; $SupplierID = $row['SupplierID']; $Location = $row['Location']; $Cost = $row['Cost']; $Status = $row['Status']; $MRL = $row['MRL']; $ProductID = $row['ProductID']; } ?&gt; //form &lt;form action="Edit_Prod.php" method="post"&gt; &lt;input type="hidden" name="ProductID" value="&lt;?php echo $ProductID; ?&gt;"/&gt; &lt;label&gt;Product Description: &lt;span class="small"&gt;Please enter a description for the product &lt;/span&gt; &lt;/label&gt; &lt;input type="text" name="ProdDesc" value="&lt;?php echo $ProdDesc ;?&gt;" /&gt; &lt;label&gt;Supplier ID &lt;span class="small"&gt;Please enter the Supplier ID&lt;/span&gt; &lt;/label&gt; &lt;input type="text" name="SupplierID" value="&lt;?php echo $SupplierID ;?&gt;" /&gt; &lt;label&gt;Bay Location: &lt;span class="small"&gt;Please select the bay location for this product &lt;/span&gt; &lt;/label&gt; &lt;select name="Location" value="&lt;?php echo $Location ;?&gt;" /&gt; &lt;option&gt;A1&lt;/option&gt; &lt;option&gt;A2&lt;/option&gt; &lt;option&gt;A3&lt;/option&gt; &lt;option&gt;A4&lt;/option&gt; &lt;option&gt;A5&lt;/option&gt; &lt;option&gt;B1&lt;/option&gt; &lt;option&gt;B2&lt;/option&gt; &lt;option&gt;B3&lt;/option&gt; &lt;option&gt;B4&lt;/option&gt; &lt;option&gt;B5&lt;/option&gt; &lt;option&gt;C1&lt;/option&gt; &lt;option&gt;C2&lt;/option&gt; &lt;option&gt;C3&lt;/option&gt; &lt;option&gt;C4&lt;/option&gt; &lt;option&gt;C5&lt;/option&gt; &lt;option&gt;D1&lt;/option&gt; &lt;option&gt;D2&lt;/option&gt; &lt;option&gt;D3&lt;/option&gt; &lt;option&gt;D4&lt;/option&gt; &lt;option&gt;D5&lt;/option&gt; &lt;option&gt;E1&lt;/option&gt; &lt;option&gt;E2&lt;/option&gt; &lt;option&gt;E3&lt;/option&gt; &lt;option&gt;E4&lt;/option&gt; &lt;option&gt;E5&lt;/option&gt; &lt;/select&gt; &lt;label&gt;Product Cost: &lt;span class="small"&gt;Please enter a new cost for the product (per roll) &lt;/span&gt; &lt;/label&gt; &lt;input type="text" name="Cost" value="&lt;?php echo $Cost ;?&gt;" /&gt; &lt;label&gt;Status: &lt;span class="small"&gt;Please select a status for the product &lt;/span&gt; &lt;/label&gt; &lt;select name="Status" value="&lt;?php echo $Status ;?&gt;" /&gt; &lt;option&gt;Live&lt;/option&gt; &lt;option&gt;Mature&lt;/option&gt; &lt;option&gt;Obsolete&lt;/option&gt; &lt;/select&gt; &lt;label&gt;MRL &lt;span class="small"&gt;Please enter a minimum re-order level for this product &lt;/span&gt; &lt;/label&gt; &lt;input type="text" name="MRL" value="&lt;?php echo $MRL ;?&gt;" /&gt; &lt;input type="submit" value= "Edit Product Details"/&gt; </code></pre> <p><strong>Undefined variable all lines, do i have to do anything differently if using drop down areas*</strong></p> <p>*<strong>Edit_Prod.php*</strong></p> <pre><code>&lt;?php $con = mysql_connect("localhost", "root", ""); mysql_select_db("supplierdetails"); if (!$con) { die('Could not connect: ' . mysql_error()); } //Run a query $ProductID = $_POST['ProductID']; $result = mysql_query ("SELECT * FROM products WHERE Productid= '".$Productid."'") or die(mysql_error()); $row = mysql_fetch_array($result); $ProdDesc = $_POST['ProdDesc']; $SupplierID = $_POST['SupplierID']; $Location = $_POST['Location']; $Cost = $_POST['Cost']; $Status = $_POST['Status']; $MRL = $_POST['MRL']; $Productid=$row['Productid']; $query="UPDATE products SET ProdDesc='".$ProdDesc."', SupplierID='".$SupplierID."', Location='".$Location."', Cost='".$Cost."', Status='".$Status."', MRL='".$MRL."' WHERE ProductID='".$ProductID."'"; $result = mysql_query($query); //Check whether the query was successful or not if($result) { echo "Products Updated"; header ("Location: Products.php"); } else { die ("Query failed"); } ?&gt; </code></pre>
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    1. COYou have a space between $row and ['Location'] - although I'd have *thought* that would be fine.
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    2. COWhere is `$row` defined?
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    3. COwhat $row contains?
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      1. USheyanshukla
 

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