<form method="POST">
    <h3>Editing: class-wc-widget-recently-viewed.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
/**
 * Recent Products Widget.
 *
 * @package WooCommerce\Widgets
 * @version 3.3.0
 */

defined( 'ABSPATH' ) || exit;

/**
 * Widget recently viewed.
 */
class WC_Widget_Recently_Viewed extends WC_Widget {

	/**
	 * Constructor.
	 */
	public function __construct() {
		$this-&gt;widget_cssclass    = 'woocommerce widget_recently_viewed_products';
		$this-&gt;widget_description = __( &quot;Display a list of a customer's recently viewed products.&quot;, 'woocommerce' );
		$this-&gt;widget_id          = 'woocommerce_recently_viewed_products';
		$this-&gt;widget_name        = __( 'Recently Viewed Products list', 'woocommerce' );
		$this-&gt;settings           = array(
			'title'  =&gt; array(
				'type'  =&gt; 'text',
				'std'   =&gt; __( 'Recently Viewed Products', 'woocommerce' ),
				'label' =&gt; __( 'Title', 'woocommerce' ),
			),
			'number' =&gt; array(
				'type'  =&gt; 'number',
				'step'  =&gt; 1,
				'min'   =&gt; 1,
				'max'   =&gt; 15,
				'std'   =&gt; 10,
				'label' =&gt; __( 'Number of products to show', 'woocommerce' ),
			),
		);

		parent::__construct();
	}

	/**
	 * Output widget.
	 *
	 * @see WP_Widget
	 * @param array $args     Arguments.
	 * @param array $instance Widget instance.
	 */
	public function widget( $args, $instance ) {
		$viewed_products = ! empty( $_COOKIE['woocommerce_recently_viewed'] ) ? (array) explode( '|', wp_unslash( $_COOKIE['woocommerce_recently_viewed'] ) ) : array(); // @codingStandardsIgnoreLine
		$viewed_products = array_reverse( array_filter( array_map( 'absint', $viewed_products ) ) );

		if ( empty( $viewed_products ) ) {
			return;
		}

		ob_start();

		$number = ! empty( $instance['number'] ) ? absint( $instance['number'] ) : $this-&gt;settings['number']['std'];

		$query_args = array(
			'posts_per_page' =&gt; $number,
			'no_found_rows'  =&gt; 1,
			'post_status'    =&gt; 'publish',
			'post_type'      =&gt; 'product',
			'post__in'       =&gt; $viewed_products,
			'orderby'        =&gt; 'post__in',
		);

		if ( 'yes' === get_option( 'woocommerce_hide_out_of_stock_items' ) ) {
			$query_args['tax_query'] = array(
				array(
					'taxonomy' =&gt; 'product_visibility',
					'field'    =&gt; 'name',
					'terms'    =&gt; 'outofstock',
					'operator' =&gt; 'NOT IN',
				),
			); // WPCS: slow query ok.
		}

		$r = new WP_Query( apply_filters( 'woocommerce_recently_viewed_products_widget_query_args', $query_args ) );

		if ( $r-&gt;have_posts() ) {

			$this-&gt;widget_start( $args, $instance );

			echo wp_kses_post( apply_filters( 'woocommerce_before_widget_product_list', '&lt;ul class=&quot;product_list_widget&quot;&gt;' ) );

			$template_args = array(
				'widget_id' =&gt; isset( $args['widget_id'] ) ? $args['widget_id'] : $this-&gt;widget_id,
			);

			while ( $r-&gt;have_posts() ) {
				$r-&gt;the_post();
				wc_get_template( 'content-widget-product.php', $template_args );
			}

			echo wp_kses_post( apply_filters( 'woocommerce_after_widget_product_list', '&lt;/ul&gt;' ) );

			$this-&gt;widget_end( $args );
		}

		wp_reset_postdata();

		$content = ob_get_clean();

		echo $content; // WPCS: XSS ok.
	}
}
</textarea><br>
    <input type="submit" value="Save">
</form>