$s->fetch()

<?php

try {
    $sql = 'SELECT id, name, email FROM author WHERE id = :id';
    $s = $pdo->prepare($sql);
    $s->bindValue(':id', $_POST['id']);
    $s->execute();
} catch (PDOException $e) {
    $error = $e->getLine().' ---- '.$e->getMessage();
    include 'error.html.php';
    exit();
}

$row = $s->fetch();

$pageTitle = 'Edycja autora';
$action = 'editform';
$name = $row['name'];
$email = $row['email'];
$id = $row['id'];
$button = 'Aktualizuj autora';

include 'form.html.php';
exit();

?>