hostas2/public/api/v1/database.php

<?php

function prepare_and_execute($conn, $stmt_string, $parameters) {
	$stmt = $conn->prepare($stmt_string);

	foreach ($parameters as $k => $v) {
		$stmt->bindValue($k, $v);
	}

	return $stmt->execute();
}

function sql_fetch_actor($conn, string $preferred_username) {
	$object_id = 'https://' . HOSTAS_DOMAIN . "/api/v1/actor/$preferred_username";
	$result = prepare_and_execute($conn,
		"select * from actor
			join object on actor.objectId = object.id
			where object.id = :object_id",
		array(':object_id' => $object_id)
	);

	// fetchArray returns false when there's no array; we're rather have it be
	// explicitly null
	$actor = $result->fetchArray(SQLITE3_ASSOC);
	return $actor !== false ? $actor : null;
}