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POphp wont update UPDATE QUERY
 

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  1. POphp wont update UPDATE QUERY
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    <p>Error stating</p> <p>Notice: Undefined variable: row in E:\xampp\htdocs\Edit_Supp.php on line 9</p> <p>Notice: Undefined index: id in E:\xampp\htdocs\Edit_Supp.php on line 12 Supplier Updated</p> <p>Code: Edit_Supp_Form.php</p> <pre><code>&lt;?php $SupplierID = $_GET['id']; //Connect and select a database mysql_connect ("localhost", "root", ""); mysql_select_db("supplierdetails"); //Run query $result1 = mysql_query("SELECT * FROM suppliers WHERE SupplierID=$SupplierID"); while($row = mysql_fetch_array($result1)){ $SupplierID = $_GET['id'] = $row['SupplierID']; $SupplierID = $row['SupplierID']; $SupplierName = $row['SupplierName']; $Currency = $row['Currency']; $Location = $row['Location']; $ContactNumber = $row['ContactNumber']; $Email = $row['Email']; } ?&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1- strict.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"&gt; &lt;head&gt; &lt;meta http-equiv="content-type" content="text/html; charset=utf-8" /&gt; &lt;meta name="description" content="" /&gt; &lt;meta name="keywords" content="" /&gt; &lt;meta name="author" content="" /&gt; &lt;link rel="stylesheet" type="text/css" href="style.css" media="screen" /&gt; &lt;form action="Edit_Supp.php" method="post"&gt; &lt;br&gt; &lt;/br&gt; &lt;input type="hidden" name="SupplierID" value="&lt;?php echo $SupplierID;?&gt;"/&gt; Supplier Name: &lt;input type="text" name="SupplierName" value="&lt;?php echo $SupplierName ;?&gt;" /&gt; &lt;br&gt; &lt;/br&gt; Currency: &lt;input type="text" name="Currency" value="&lt;?php echo $Currency ;?&gt;" /&gt; &lt;br&gt; &lt;/br&gt; Location: &lt;input type="text" name="Location" value="&lt;?php echo $Location ;?&gt;" /&gt; &lt;br&gt; &lt;/br&gt; Contact Number:&lt;input type="text" name="ContactNumber" value="&lt;?php echo $ContactNumber ;?&gt;" /&gt; &lt;br&gt; &lt;/br&gt; Email:&lt;input type="text" name="Email" value="&lt;?php echo $Email ;?&gt;" /&gt; &lt;br&gt; &lt;/br&gt; &lt;input type="submit" value= "Edit Supplier Information"/&gt; &lt;/form&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>//Plus code for the Edit_Sup which is the code behind this page:</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 $SupplierID= $_POST['id'] = $row ["SupplierID"]; $result1 = mysql_query ("SELECT * FROM suppliers WHERE SupplierID= '".$SupplierID."'") or die (mysql_error()); $row = mysql_fetch_array($result1); $SupplierID = $_GET['id']; $SupplierID = $_POST['id']; $SupplierName = $_POST['SupplierName']; $Currency = $_POST['Currency']; $Location = $_POST['Location']; $ContactNumber = $_POST['ContactNumber']; $Email = $_POST['Email']; $SupplierID = $row['SupplierID']; $query = "UPDATE suppliers SET SupplierName = '".$SupplierName."', Currency = '".$Currency."', Location = '".$Location."', ContactNumber = '".$ContactNumber."', Email = '".$Email."' WHERE SupplierID = '".$SupplierID."'"; $result1 = mysql_query($query); //Check whether the query was successful or not if($result1) { echo "Supplier Updated"; } else { die ("Query failed"); } ?&gt; </code></pre>
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    1. COpossible duplicate of [php UPDATE QUERY fail my_fetch_array](http://stackoverflow.com/questions/10243509/php-update-query-fail-my-fetch-array)
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    2. COwhere is the duplicate?
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    3. COI smell SQL injection.
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