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Juan
PHP SQL Injection Example,
February 16, 2009 at 8:16 PM

I did your code in your example PHP SQL Injection, why do I always get SQL error:Unknown column for surname? here's the code.
<html>
<title>Table for Students</title>

<body ">
<body bgcolor= #6A5ACD>

<form method="post" action="insert.php"

style="border: 4px solid #000000;
width :260px; margin-top:
50px;margin-left: 70px;
padding:20px 20px 20px 20px;
background-color:#DDA0DD ;">
<table cellpadding="5">

<tr >
<td>Firstname</td>
<td>&nbsp;</td>
<td><input type="text" name="name"></td>
</tr>
<tr>
<td>Lastname</td>
<td>&nbsp;</td>
<td><input type="text" name="lname"></td>
</tr>
<tr>
<td>Nickname</td>
<td>&nbsp;</td>
<td><input type="text" name="nname"></td>
</tr>
<tr>
<td>Birth</td>
<td>&nbsp;</td>
<td><input type="text" name="bh"></td>
</tr>
<tr>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td><input type="submit" name="submit" value="Add Records"></td>
</tr>
</table>

</form>

<div style="border: 4px solid #000000;
width :800px; margin-top:
50px;margin-left: 70px;
padding:20px 20px 20px 20px ;
background-color: #DDA0DD;">

<?php


$connection = mysql_connect('localhost','root','')
or die("Could not connect: ".mysql_error());
$connection1 = mysql_connect('localhost','root','')
or die("Could not connect: ".mysql_error());

mysql_select_db('pvdorm',$connection)
or die("Error in selecting the database:".mysql_error());

if (isset($_POST['name'])) {
$Firstname=$_POST["name"];
$Lastname=$_POST["lname"];
$Nickname=$_POST["nname"];
$Birth=$_POST["bh"];

$sql="insert into students(firstname,lastname,nickname,birth)
values('".$Firstname."',".$Lastname.",".$Nickname.",".$Birth.")";

mysql_query($sql,$connection)
or exit("Sql Error:".mysql_error());
mysql_close($connection);

}

$sql="Select *from students";

$sql_result=mysql_query($sql,$connection1)
or exit("Sql Error".mysql_error());

$sql_num=mysql_num_rows($sql_result);




echo "<table width=\"200%\">";
echo "<tr>";
echo "<td ><b>Student_id</b></td><td><b>Firstname</b></td>
<td><b>Lastname</b></td><td><b>Nickname</b></td><td><b>Birth</b></td>";
echo "</tr>";
while($sql_row=mysql_fetch_array($sql_result))
{
$student_id=$sql_row["student_id"];
$name=$sql_row["firstname"];
$lname=$sql_row["lastname"];
$nname=$sql_row["nickname"];
$bh=$sql_row["birth"];

echo "<td>".$student_id."</td>";
echo "<td>".$name."</td>";
echo "<td>".$lname."</td>";
echo "<td>".$nname."</td>";
echo "<td>".$bh."</td></tr>";
}
echo "</table>";
mysql_close($connection1);
?>
</div>
</body>
</html>
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