if(isset($_POST['save']))
{
    echo "<pre>";
    print_r($_POST);
    echo "</pre>";
$query = 'INSERT INTO restaurants (nom, lieu, tickets) VALUES (:nom, :lieu, :tickets)';
$prep = $pdo->prepare($query);
$prep->bindValue(':nom', $_POST['nom'], PDO::PARAM_STR);
$prep->bindValue(':lieu', $_POST['lieu'], PDO::PARAM_STR);
$prep->bindValue(':tickets', $_POST['tickets'], PDO::PARAM_BOOL);
$prep->execute();

}

?>

<div class="forminsert">

<form action="PI.php" method="post">
<label id="first"> Nom du restaurant:</label><br/>
<input type="text" name="nom"><br/>

<label id="first">lieu</label><br/>
<input type="text" name="lieu"><br/>

<label id="first">Accepte les tickets restaurants ?</label><br/>
<input type="checkbox" name="tickets" value="1"><br/>

<input type="submit" name="save"/>

</form>

</div>