";
if ($stmt = $mysqli->prepare($query)) {
$stmt->bind_param('i', $customer_id);
$stmt->execute();
$stmt->bind_result($film_id, $title);
while ($stmt->fetch()) {
// Assume no special HTML character
echo " $title (id: #$film_id): ".
"similar films\n";
}
$stmt->close();
}
echo "";
}
elseif ($film_id != '') {
$query = <<<__QUERY
SELECT DISTINCT f.title, c.name
from film AS f INNER JOIN film_category fc ON (f.film_id = fc.film_id)
INNER JOIN category AS c ON (fc.category_id = c.category_id)
WHERE fc.film_id = ?
__QUERY;
if ($stmt = $mysqli->prepare($query)) {
$stmt->bind_param('i', $film_id);
$stmt->execute();
$stmt->bind_result($film_title, $category);
$stmt->fetch();
// Assume no special HTML character
$stmt->close();
}
echo "The film $film_title (id #$film_id) has the following similar films in the same category of $category:\n";
echo "";
$query = <<<__QUERY
SELECT DISTINCT f.film_id, f.title, COUNT(fa1.actor_id) AS count
FROM film AS f INNER JOIN film_actor AS fa1 ON (f.film_id = fa1.film_id)
INNER JOIN film_actor AS fa2 ON (fa1.actor_id = fa2.actor_id AND f.film_id <> fa2.film_id)
INNER JOIN film_category AS fc1 ON (f.film_id = fc1.film_id)
INNER JOIN film_category AS fc2 ON (fa2.film_id = fc2.film_id AND fc1.category_id = fc2.category_id)
WHERE fa2.film_id = ?
GROUP BY f.film_id, f.title
ORDER BY count DESC
LIMIT 20;
__QUERY;
if ($stmt = $mysqli->prepare($query)) {
$stmt->bind_param('i', $film_id);
$stmt->execute();
$stmt->bind_result($film_id, $title, $actorCount);
while ($stmt->fetch()) {
// Assume no special HTML character
echo "- ($title id: (#$film_id): number of common actors -> $actorCount.
\n";
}
$stmt->close();
}
}
else {
echo "Please specify a customer_id in your URL by adding the query string \"?cid=1\" at the end of the URL.";
echo "You may replace 1 by any customer_id in the query string.";
}
?>