[product_by_categorie="pcategory"] add_shortcode( 'product_by_categorie', 'product_by_categorie_fun' ); function product_by_categorie_fun($arg) { ob_start(); set_query_var('pcategoryval', $arg['pcategory']); //$pcategory = $_POST['pcategory']; get_template_part('productsdtl'); return ob_get_clean(); } $doorcats = $pcategoryval;