PHP
<?php
$con = new PDO('mysql:host=localhost;dbname=x','username','password');
con->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sql = "INSERT INTO tablename (username, password, email) VALUES (:username, :password, :email)";
$query = $con->prepare($sql);
$query->bindParam(':username', $_POST['username'], PDO::PARAM_STR);
$query->bindParam(':password', $_POST['password'], PDO::PARAM_STR);
$query->bindParam(':email', $_POST['email'], PDO::PARAM_STR);
$query->execute(); //Execute query: insert data into db
?>
Zoiets, maar dan moet je uiteraard wel je eigen variabelen etc. invullen.