如何查询某张专辑中的照片

Question

PhotosInAlbums表

照片表

使用$mysqli->query()，我想返回照片表中的photo_id与PhotoInAlbums中的photo_id与相同album_id匹配的所有行。基本上，返回同一专辑中照片的信息（id，title，date_created，date_modified，file_path），这样我就可以在表格中显示这些照片。我该怎么做呢？此外，我对$results2的查询返回false，我不知道为什么。

代码

//Gets album id from form
$album_id = $_GET['album_id'];

//Returns all photo_id for photos in that album
$result2 = $mysqli->query("SELECT photo_id FROM PhotosInAlbum WHERE album_id = $album_id"); //RETURNS FALSE WHY?

//Returns all the rows where the photo_id matches Photos tables' id
$result = $mysqli->query("SELECT * FROM Photos WHERE id = $result2");

    while ( $row = $result->fetch_assoc()) {
 print('<div class = "cell">
                <div class = "photo_container" >

        $title = $row[ 'title'];
        $file_path = $row[ 'file_path' ];

        print('<img class = "photo_image" src = "'.$file_path.'" alt = "default album" width = "300"/>
        print('<div class = "photo_title">'.$title.' ('.$credit.')</div>');               
        print('  </div>
            </div>');
    }