Denver SEO Blog » Shopp

Add Canonical Tags to Shopp Plugin for SEO

Zack Katz — Wed, 21 Oct 2009 18:36:31 +0000

I am building a store using the Shopp plugin, and I noticed that there are possibilities for duplicate content issues:

A product can be accessed both by /shop/{productID} and /shop/{product-slug}
A tag can be accessed using /shop/?shopp_tag={tag-uri} and /shop/tag/{tag-slug}
A tag can be accessed using /shop/?shopp_category={category-id} and /shop/{category-uri}

Should Google somehow find it’s way into indexing these pages, the value of the identical indexed pages may drop. Canonical tags aim to remedy this situation, and are implemented by the hugely popular and awesome All in One SEO Pack plugin (see my other SEO tips regarding AIOSEO Pack plugin).

The Shopp plugin does not feature canonical tag support, so here’s a modification you can make that will add support for it without changing any core files in All in One SEO Pack, or in Shopp.

Add the following code to your theme’s functions.php file

function shopp_canonical_tag() {
	global $Shopp, $aioseop_options; // The All in One SEO Pack Options Variable

	// Get all the pages Shopp is using and make an array
	$ShoppPages = $Shopp->Settings->get('pages');
	$pages = array();
	foreach($ShoppPages as $ShoppPage) { $pages[] = $ShoppPage['id']; }

	// If in a Shopp page...
	if(is_page($pages)) {
		// Path to Shopp installation
		$path = $Shopp->shopuri;
		$link = '';
		if($Shopp->Product->id) { // If in a product
			$link = $Shopp->Product->slug;
		}
		elseif($Shopp->Category->id) { // If in a category
			$link = $Shopp->Category->uri;
		}
		elseif($Shopp->Category->tag) { // If in a tag
			$link = $Shopp->Category->slug.'/'.$Shopp->Category->uri;
		}
		elseif(isset($Shopp->Cart->data->Search)) { // If in a search result
			$link = 'search/'.$Shopp->Cart->data->Search;
		}
		if($link) {
			// Turn off All in One SEO pack canonical URLs for this page
			$aioseop_options['aiosp_can'] = false;

			// Add the proper trailing slashes to the link using this WP function
			$link = trailingslashit($path.$link);
			echo "\n\t".''."\n\t";
		}
	}
}
// Add the function to your site's  and run it before AIOSEO Pack
add_action('wp_head', 'shopp_canonical_tag', 1);

When Shopp tells this function that it is on a product, tag, search, or category page, it will show a canonical tag to that page. If Shopp doesn’t have an available page, it will leave it up to the SEO Pack plugin to show its canonical tag as usual (which works on the checkout, account, and other pages).

This code will set you up nicely for a SEO’d-out shopping cart. Leave feedback below!

Add a Store Catalog XML Sitemap to the Shopp Plugin

Zack Katz — Thu, 01 Oct 2009 21:19:28 +0000

The Shopp default RSS/XML/Google Base solution was not enough.

I needed to have a Google Base feed that featured all the store products. For some reason, the recommended process wasn’t working for me. It was either showing only recent products, or it wasn’t working at all. Here’s how I fixed it:

This code will show you the way to full indexing. Trust it. Feel it.

Add the following code before case "newproducts-rss": (near line 1295) in Shopp.php:

// This adds sitemap functionality for all products
case "catalog-rss":
	$CatalogProducts = new CatalogProducts(array('show' => 50000));
	header("Content-type: application/rss+xml; charset=utf-8");
	echo shopp_rss($CatalogProducts->rss());
	exit();
	break;

Once you add that, you will be able to see a RSS feed of your entire catalog by visiting yoursite.com/your-shop-location/index.php?shopp_lookup=catalog-rss

If the RSS feed is empty, try commenting out (add // before it) the following code near line 484 in /core/model/Category.php: $item = apply_filters('shopp_rss_item',$entry,$product);

Hope this helps!

Edit Product Link for Shopp Plugin

Zack Katz — Tue, 25 Aug 2009 23:24:32 +0000

If you use the Shopp plugin for WordPress, you’ve likely found something frustrating: you click on the “Edit Post” link, and you get to edit the Store page, not the product in Shopp.

Here’s a quick fix: add the following to your theme’s functions.php file:

function edit_product_link($link = 'Edit Product', $before = '', $after = '') {
	global $post, $Shopp;

	if ( $post->post_type == 'page' ) {
		if ( !current_user_can( 'edit_page', $post->ID ) )
			return;
	} else {
		if ( !current_user_can( 'edit_post', $post->ID ) )
			return;
	}

	if (shopp('product','found')) {
		$page = 'shopp-products-edit';
		$id = shopp('product','id','return=true');
	}

	$url = admin_url("/admin.php?page=$page&id=$id");

	$link = '' . $link . '';
	echo $before . $link . $after;
}

Then add edit_product_link() into your template, and you can edit products directly from your website. Woot!.