products.php

<?php
/**
 * A products field template
 * Ensure that the 'Products Quantities' field is set to 'One Only'
 * @since 2.2.0
 * @package WooCommerce Product Add Ons Ultimate
 */

// Exit if accessed directly
if( ! defined( 'ABSPATH' ) ) {
	exit;
}

echo pewc_field_label( $item, $id );

if( isset( $item['child_products'] ) ) {
	$layout = $item['products_layout'];
	$index = 0;
	// Set the allow_none parameter according to whether the field is required or not
	// allow_none means that child products can be deleted from the cart without deleting the parent product
	$allow_none = empty( $item['required'] ) ? true : false;

	// This is the custom layout
	$number_columns = ( isset( $item['number_columns'] ) ) ? $item['number_columns'] : 3;
	$checkboxes_wrapper_classes = array(
		'pewc-checkboxes-images-wrapper',
		'child-product-wrapper'
	);
	$checkboxes_wrapper_classes[] = 'pewc-columns-' . intval( $number_columns );
	if( ! empty( $item['hide_labels'] ) ) {
		$checkboxes_wrapper_classes[] = 'pewc-hide-labels';
	}

	if( ! empty( $item['products_quantities'] ) ) {
		$products_quantities = ! empty( $item['products_quantities'] ) ? $item['products_quantities'] : '';
		$checkboxes_wrapper_classes[] = 'products-quantities-' . $item['products_quantities'];
	} ?>

	<table class="<?php echo join( ' ', $checkboxes_wrapper_classes ); ?>" data-products-quantities="<?php echo esc_attr( $item['products_quantities'] ); ?>">

		<?php foreach( $item['child_products'] as $child_product_id ) {

			$child_product = wc_get_product( $child_product_id );

			$price = pewc_maybe_include_tax( $child_product, $child_product->get_price() );
			$price = wc_price( $price );

			// Check stock availability
			$disabled = '';
			if( ! $child_product->is_purchasable() || ! $child_product->is_in_stock() ) {
				$disabled = 'disabled';
			}
			// Check available stock if stock is managed
			$available_stock = '';
			if( $child_product->managing_stock() ) {
				$available_stock = $child_product->get_stock_quantity();
			}

		  $name = get_the_title( $child_product_id );

			$field_name = $id . '_child_product';

			$checkbox_id = $id . '_' . $child_product_id;

			$wrapper_classes = array(
				'pewc-checkbox-image-wrapper'
			);
			if( $disabled ) {
				$wrapper_classes[] = 'pewc-checkbox-disabled';
			}

			$checked = ( $value == $id ) ? 'checked="checked"' : '';

			$quantity_field = '';
			if( $products_quantities == 'independent' ) {
				// Add a quantity field for each child checkbox
				// The name format is {$id}_child_quantity_{$child_product_id}
				// Where $id is the field ID and $child_product_id is the child product ID
				$quantity_field = sprintf(
					'<input type="number" min="0" step="1" max="%s" class="pewc-form-field pewc-child-quantity-field" name="%s" value="0" %s>',
					$available_stock,
					esc_attr( $id ) . '_child_quantity_' . esc_attr( $child_product_id ),
					$disabled
				);
			}

			$option_cost = pewc_maybe_include_tax( $child_product, $child_product->get_price() );

			// Start the row
			$table_row = '<tr>';

				// Add a thumbnail
				$image_url = ( get_post_thumbnail_id( $child_product_id ) ) ? wp_get_attachment_url( get_post_thumbnail_id( $child_product_id ) ) : wc_placeholder_img_src();
				// Setting a width and height here
				$image = '<img style="max-width: 50px; height: auto;" src="' . esc_url( $image_url ) . '">';
				$table_row .= sprintf(
					'<td>%s</td>',
					$image
				);

				// Add a checkbox in the first column
				$table_row .= sprintf(
			    '<td><input data-option-cost="%s" type="checkbox" name="%s[]" id="%s" class="pewc-checkbox-form-field" value="%s" %s %s></td>',
			    esc_attr( $option_cost ),
			    esc_attr( $field_name ),
			    esc_attr( $checkbox_id ),
			    esc_attr( $child_product_id ),
					esc_attr( $checked ),
					esc_attr( $disabled )
			  );

				// Add the child product name
			  $table_row .= sprintf(
			    '<td class="%s"><label for="%s">%s</label></td>',
					join( ' ', $wrapper_classes ),
			    esc_attr( $checkbox_id ),
					$name
			  );

				// Example column to get child product meta, e.g. SKU
				$sku = $child_product->get_sku();
				$table_row .= sprintf(
					'<td>%s</td>',
					$sku
				);

				// Price column
				$table_row .= sprintf(
			    '<td>%s</td>',
			    $price
			  );

			$table_row .= '</row>';

		  echo $table_row;

		} ?>

	</table><!-- .pewc-radio-images-wrapper -->
	<input type="hidden" name="<?php echo esc_attr( $id ); ?>_quantities" value="<?php echo esc_attr( $item['products_quantities'] ); ?>">
	<?php $allow_none = ! empty( $item['allow_none'] ) ? 1 : 0; ?>
	<input type="hidden" name="<?php echo esc_attr( $id ); ?>_allow_none" value="<?php echo esc_attr( $allow_none ); ?>">
<?php }