How to create checkboxes with preselected values from database?

I am trying to create checkbox with preselected values which comes from my database (Genres). For example, if this movie has 3 different genres: comedy, romance and action (in the database), these genres will be preselected (have default value) checkboxes. The problem is that i need all the checkboxes (genres) which I get from the following SQL-query:

$sql = 'SELECT Movie.* FROM Movie WHERE Movie.id = ?';

and default values (ticked checkboxes) which I get from the following SQL-query:

$sql = 'SELECT Genre.name FROM (Genre JOIN Movie2Genre ON Movie2Genre.idGenre = Genre.id) JOIN Movie ON Movie2Genre.idMovie = Movie.id WHERE Movie.id = ?';



If you have a solution or any simpler method I would love to hear you out.

(PS: My if-statement is not working as I want it to do)

        <?php
        foreach ($allGenre as $val){
            foreach ($aktivGenre as $act) {
                if ($act==$val) {
                    $active = "checked";
                }else {
                    $active = "";
                }
            }


            echo "<input type='checkbox' name='{$val["name"]}' value='{$val["name"]}'".$active." >{$val["name"]}"; //$active="selected" when 
        }
        ?>