Need help fixing Custom WordPress Re-route getting custom meta for posts from custom table

I am currently working on Re-route custom meta for posts. I have successfully made the values spit out on the page using an echo but when I return the values into the input fields I only get the first letter of each one. I have tried multiple things and have had no success. I would like someone to resolve this problem and also write a loop to then display these fields on a custom post template. Here is the function that has the issue: add_action( ‘get_post_metadata’, ‘my_custom_meta_get’, 0, 3 ); function my_custom_meta_get( $check, $post_id, $meta_key ) { // var_dump($meta_key); if ( get_post_type( $post_id) == ‘schools’ && in_array( $meta_key, array( ‘[login to view URL]’, ‘[login to view URL]’, ‘address’, ‘zip’, ‘phone’ ) ) ) { global $wpdb; $result = $wpdb->get_var( $wpdb->prepare(” SELECT $meta_key FROM wp_schoolInfo inner join USZipCodes on [login to view URL] = [login to view URL] inner join wp_post_to_schoolinfo on [login to view URL] = [login to view URL] inner join wp_posts on [login to view URL] = wp_post_to_schoolinfo.post_id WHERE post_id = %d “, $post_id) ); return maybe_unserialize( $result ); } else { return null; } }