Connessione riuscita!
<form method="POST" enctype="multipart/form-data">
Codice: <input type="number" name="codice" required><br>
Modello: <input type="text" name="modello" required><br>
Marca: <input type="text" name="marca"><br>
Prezzo: <input type="number" step="0.01" name="prezzo"><br>
OS:
<select name="os">
    <option value="Android">Android</option>
    <option value="iOS">iOS</option>
</select><br>
Foto: <input type="file" name="foto" required><br>
<button type="submit">Inserisci</button>
</form>