Woocommerce 點選圖片就可以直接加入購物車或是到結帳頁面

// woocommerce
// 設定圖片上的商品連結
if ( ! function_exists( 'woocommerce_template_loop_product_link_open' ) ) {
	/**
	 * Insert the opening anchor tag for products in the loop.
	 */
	function woocommerce_template_loop_product_link_open() {
		global $product;
		
        //原先的設定
		//$link = apply_filters( 'woocommerce_loop_product_link', get_the_permalink(), $product );
      
      	// 1.改成直接到結帳頁面中
        $link = '/checkout/?add-to-cart='.$product->get_id().'&quantity=1';
      	
      	// 2.點選圖片直接會到購物車中
      	$link = '/cart/?add-to-cart='.$product->get_id().'&quantity=1';
      
      	// 3.點選圖片後不跳轉，但會加入到購物車中
      	$link = '/?add-to-cart='.$product->get_id();

		echo '<a href="' . esc_url( $link ) . '" class="woocommerce-LoopProduct-link woocommerce-loop-product__link">';
	}
}

function et_extra_get_post_thumb( $args = array() ) {
	$default_args = array(
		'post_id'                    => 0,
		'size'                       => '',
		'height'                     => 50,
		'width'                      => 50,
		'title'                      => '',
		'link_wrapped'               => true,
		'permalink'                  => '',
		'a_class'                    => array(),
		'img_class'                  => array(),
		'img_style'                  => '',
		'img_after'                  => '', // Note: this value is not escaped/sanitized, and should be used for internal purposes only, not any user input
		'post_format_thumb_fallback' => false,
		'fallback'                   => '',
		'thumb_src'                  => '',
		'return'                     => 'img',
	);

	$args = wp_parse_args( $args, $default_args );

	$post_id = $args['post_id'] ? $args['post_id'] : get_the_ID();

	// add to cart link
	//$permalink = !empty( $args['permalink'] ) ? $args['permalink'] : get_the_permalink( $post_id );
	$permalink = !empty( $args['permalink'] ) ? $args['permalink'] : '/checkout/?add-to-cart='.$post_id.'quantity=1';
	
	$title = !empty( $args['title'] ) ? $args['title'] : get_the_title( $post_id );

	$width = (int) apply_filters( 'et_extra_post_thumbnail_width', $args['width'] );
	$height = (int) apply_filters( 'et_extra_post_thumbnail_height', $args['height'] );
	$size = !empty( $args['size'] ) ? $args['size'] : array( $width, $height );
	$thumb_src = $args['thumb_src'];
	$img_style = $args['img_style'];

	$thumbnail_id = get_post_thumbnail_id( $post_id );

	if ( !$thumbnail_id && !$args['thumb_src'] ) {
		if ( $args['post_format_thumb_fallback'] ) {
			$post_format = et_get_post_format();
			if ( in_array( $post_format, array( 'video', 'quote', 'link', 'audio', 'map', 'text' ) ) ) {
				$thumb_src = et_get_post_format_thumb( $post_format, 'thumb' );
			} else {
				$thumb_src = et_get_post_format_thumb( 'text', 'thumb' );
			}
		} else if ( !empty( $args['fallback'] ) ) {
			return $args['fallback'];
		} else {
			$thumb_src = et_get_post_format_thumb( 'text', 'icon' );
		}
	}

	if ( $thumbnail_id ) {
		list($thumb_src, $thumb_width, $thumb_height) = wp_get_attachment_image_src( $thumbnail_id, $size );
	}

	if ( 'thumb_src' === $args['return'] ) {
		return $thumb_src;
	}

	$image_output = sprintf(
		'<img src="%1$s" alt="%2$s"%3$s %4$s/>%5$s',
		esc_attr( $thumb_src ),
		esc_attr( $title ),
		( !empty( $args['img_class'] ) ? sprintf( ' class="%s"', esc_attr( implode( ' ', $args['img_class'] ) ) ) : '' ),
		( !empty( $img_style ) ? sprintf( ' style="%s"', esc_attr( $img_style ) ) : '' ),
		$args['img_after']
	);

	if ( $args['link_wrapped'] ) {
		$image_output = sprintf(
			'<a href="%1$s" title="%2$s"%3$s%5$s>
				%4$s
			</a>',
			esc_attr( $permalink ),
			esc_attr( $title ),
			( !empty( $args['a_class'] ) ? sprintf( ' class="%s"', esc_attr( implode( ' ', $args['a_class'] ) ) ) : '' ),
			$image_output,
			( !empty( $img_style ) ? sprintf( ' style="%s"', esc_attr( $img_style ) ) : '' )
		);
	}

	return $image_output;
}