sql insert


<!DOCTYPE html>
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<html>
    <head>
        <meta charset="UTF-8">
        <title>SQL insert</title>
    </head>
    <body>
        <form action="index.php" method="post">
            <p>Proizvodjac:            <input type="text" name="proizvodjac" /></p>
            <p>Model:        <input type="text" name="model" /></p>
            <p><input type="submit" name="submit" value="Upisi" /></p>
        <?php
        if(!empty($_POST["proizvodjac"]) && !empty($_POST["model"])) {

            $proizvodjac = $_POST["proizvodjac"];
            $model = $_POST["model"];

            echo "INSERT INTO baza (Proizvodjac, Model) VALUES ($proizvodjac, $model);";
        }
        ?>
    </body>
</html>