Product Schema for WooCommerce

functions.php

<?php

add_action( 'wp_head', 'add_product_info_to_head' );

function add_product_info_to_head() {
	global $product;
	if ( is_product() ) {
		$image = wp_get_attachment_image_url( $product->get_image_id(), 'full', false );
		echo '<script type="application/ld+json">
		{
		  "@context": "https://schema.org/",
		  "@type": "Product",
		  "name": "' . $product->get_name() . '",
		  "image": ["' . $image . '"],
		  "description": "' . ($product->get_short_description() != ''? $product->get_short_description(): $product->get_formatted_name()) . '",
		  "sku": "' . $product->get_sku() . '",
		  "mpn": "' . $product->get_sku() . '",
		  "brand": {
			"@type": "Brand",
			"name": "Not A Brand"
		  },
		  "review": {
			"@type": "Review",
			"reviewRating": {
			  "@type": "Rating",
			  "ratingValue": "4",
			  "bestRating": "5"
			},
			"author": {
			  "@type": "Person",
			  "name": "Not A Person"
			}
		  },
		  "aggregateRating": {
			"@type": "AggregateRating",
			"ratingValue": "4.4",
			"reviewCount": "89"
		  },
		  "offers": {
			"@type": "Offer",
			"url": "' . $product->get_permalink() . '",
			"priceCurrency": "AZN",
			"price": "' . $product->get_price() . '",
			"priceValidUntil": "2030-12-31",
			"itemCondition": "https://schema.org/NewCondition",
			"availability": "'.('instock' ===$product->get_stock_status() ? "https://schema.org/InStock" : "https://schema.org/OutOfStock").'"
		  }
		}
		</script>';

	}
}