<form method="post" action="">
First Name: <input type="text" size="10" maxlength="40" name="fname"> <br />
Last Name: <input type="text" size="10" maxlength="40" name="lname"> <br />
Email: <input type="text" size="10" maxlength="100" name="email"><br />
<input type="submit" value="Put in database">
</form>

<?php
/************
 * By Peter *
 ************/

$db_host="";
$db_user="";
$db_pass="";
$db_database="";

if(!isset($_POST['fname'])) exit;

$con = mysql_connect($db_host,$db_user,$db_pass);
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db($db_database, $con);

mysql_query("INSERT INTO Persons (FirstName, LastName, email) VALUES ('".$_POST['fname']."', '".$_POST['lname']."', '".$_POST['email']."')");

mysql_close($con);
?>