M2 – Foreach only count attributes with value

I have a foreach loop and a array that counts the total attributes from a attribute group.

What I need that the array only counts the attributes that have a value.

This is the code:

< ?php
    function show_av($_product, $av_merk, $id, $labelchck) {
        $av_attr_value = '';
        $av_attribute_group = $_product->getAttributes($id);
        $objectManager = MagentoFrameworkAppObjectManager::getInstance();
        $groupmodel = $objectManager->get('MagentoEavModelEntityAttributeGroup')->load($id);
    ?>

        < ?php
            $icount = 1;
            $len_count = count($av_attribute_group);
            foreach ($av_attribute_group as $av_attribute_groups): 

            $av_attr_name = $av_attribute_groups->getName();
            $av_attr_label = $_product->getResource()->getAttribute($av_attr_name)->getFrontend()->getLabel($_product);
            $av_attr_value = $_product->getResource()->getAttribute($av_attr_name)->getFrontend()->getValue($_product);
            $spec_container_name = $groupmodel->getAttributeGroupName();

            if( $av_attr_value != "" ) :
                if($icount < = 1) {
            ?>

                
                < ?php echo $groupmodel->getAttributeGroupName(); ?>

            < ?php } ?>
< ?php echo $av_attr_label; ?>

                            < ?php if ($av_attr_value == "Yes" || $av_attr_value == "Ja") : ?>
< ?php elseif ($av_attr_value == "No" || $av_attr_value == "Nee") : ?>
< ?php
                            else :
                                echo $av_attr_value;
                            endif;
                            ?>
                        
< ?php echo $icount ?>
            < ?php echo $len_count ?>
            < ?php if ($icount == $len_count) { ?>
            Last item
                
< ?php } ?>

            < ?php endif; ?>

        < ?php $icount++; endforeach; ?>

< ?php } ?>

How can I let the array only collect the attributes with a value?