<?php

// If the form hasn't been submitted yet
if (!isset($_POST['username'])) {

    // Echo the form. Customize this how you please
    echo "<form method=post action=register.php>";
    echo "Username: <input type=text name=username><br>";
    echo "Password: <input type=password name=password><br>";
    echo "<input type=submit value=Register>";
    echo "</form>";

// If the form has been submitted
}else{

    // FILL THIS IN WITH YOUR DATABASE INFO
    $db_host = 'localhost';
    $db_user = '';
    $db_name = '';
    $db_pass = '';
    $tbl_name = '';

    // Connect to the database
    mysql_connect($db_host, $db_user, $db_pass) or die ('Cannot Connect Database');
    mysql_select_db($db_name) or die ('Cannot Select Database');

    // Randomly generate an id
    $id = rand();

    // Run the query into the database
    mysql_query("INSERT INTO `".$tbl_name."` VALUES (".$id.", '".mysql_real_escape_string($_POST['username'])."', '".mysql_real_escape_string($_POST['password'])."');");

    // Echo the complete message. Customize this as you please
    echo "Registration Complete";

}

?>