Display yellow stars based on rating + Metadata

<!-- Display yellow stars based on rating -->
                <strong>Rating: </strong>
                <?php
                $nb_stars = intval( get_post_meta( get_the_ID(), 'movie_rating', true ) );
                for ( $star_counter = 1; $star_counter <= 5; $star_counter++ ) {
                    if ( $star_counter <= $nb_stars ) {
                        echo '<img src="' . plugins_url( 'Movie-Reviews/images/icon.png' ) . '" />';
                    } else {
                        echo '<img src="' . plugins_url( 'Movie-Reviews/images/grey.png' ). '" />';
                    }
                }
                ?>


DISPLAYING METADATA LINK
Metadata can be retrieved easily using the get_post_meta() function. In our example above, we saved a post meta field named product_price. We can retrieve the value of this field for a given post using the following code:
<?php
  // If we are in a loop we can get the post ID easily
  $price = get_post_meta( get_the_ID(), 'product_price', true );

  // To get the price of a random product we will need to know the ID
  $price = get_post_meta( $product_id, 'product_price', true );
?>

<?php
    $args = array(
      'post_type' => 'product',
      'tax_query' => array(
        array(
          'taxonomy' => 'product_category',
          'field' => 'slug',
          'terms' => 'boardgames'
        )
      )
    );
    $products = new WP_Query( $args );
    if( $products->have_posts() ) {
      while( $products->have_posts() ) {
        $products->the_post();
        ?>
          <h1><?php the_title() ?></h1>
          <div class='content'>
            <?php the_content() ?>
          </div>
        <?php
      }
    }
    else {
      echo 'Oh ohm no products!';
    }
  ?>