foreach ($_POST['calc_test__number'] as $item)
echo $item."\n";select product.*, category.name as category_name
from product
inner join category
on product.category_id = category.id$(".tab__item-title a").click(function() {
$('.tab__item-categories').removeClass('visible').addClass('active');
$(this).closest('.tab__item-categories').removeClass('active').addClass('visible');
});var $button = $('.colors-pic');
$button.on('click', function () {
var n=$button.index(this);
$(this).closest('селектор карточки').find('.product-img').removeClass("ch-img").eq(n).addClass("ch-img");
});