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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <?php
        $USR = $_POST["username"];
        $PWD = $_POST["password"];
        $PWD1 = $_POST["password1"];

        if ($PWD == $PWD1) {

        } else {
            echo "<h1>Not the same password given</h1>";
            die();
        };

        $DSN = 'mysql:host=localhost;dbname=test';
        $pdo = null;
        $dbusr = "root";
        $dbpwd = "";
        $SQL = 'INSERT INTO `users`(`username`, `password`) VALUES (":USR",":PWD")';

        try {
            $pdo = new PDO($DSN, $dbusr, $dbpwd);
            $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        } catch (PDOException $e) {
            echo 'Connection failed: ' . $e->getMessage();
        }

        $stmt = $pdo->prepare($SQL);

        $stmt->execute(array($USR,$PWD));

        $results = $stmt->fetchAll(PDO::FETCH_ASSOC);

        $pdo = null;
        $stmt = null;
    ?>

    <h1>Results: <?php

    if ($SUCC) {
        echo 'Successful!';
    } else {
        echo 'Unsuccessful.';
    }
    ?></h1>
</body>
</html>