<?php

$user_username = "haironfire907";
$user_password = "dicks";

error_reporting(E_ALL);
ini_set('display_errors', '1');

$dsn = "pgsql:host=db.doc.ic.ac.uk;port=5432;dbname=g1027121_u";
$user = "g1027121_u";
$password = "sUyzTDIKq4";

$link = new PDO($dsn,$user,$password);

$stmt = $link -> prepare ("SELECT username, password FROM users WHERE username = '${user_username}';");
$stmt -> execute();

if ($stmt -> rowCount() < 1) {
    echo "You are not in the database.";
} else {
    $row = $stmt -> fetch();
    if ($row['password'] == $user_password) {
        echo "OK.";
    } else {
        echo "Wrong password!";
    }
}

?>