How to add schema to WordPress without plugin

From time to time I get asked if it’s possible to add schema to WordPress without plugin. And the answer is yes. Even though it’s super inconvenient if you want to add Structured Data to many posts at once. But read on to learn more about schema, Structured Data and the benefits in SEO.

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Find weird issues using WP_DEBUG

For a developer like me it is impossible to achieve full compatibility with all plugins and themes in the WordPress ecosystem. In spite of all the care taken, it is simply the case that some plugins or even the theme will output a strange error. On this page you can find out how to locate these errors using WP_DEBUG.


Let’s say you have an issue on WooCommerce category pages. It’s a weird behavior that occurs but you know it only happens when SNIP is activated. You can do the following to get to the error log:

  1. Follow the guide here on how to enable WP_DEBUG.
  2. Also make sure you activate WP_DEBUG_LOG.
  3. Once this is done, navigate to the page where the problem occurs (in our case this would be a WooCommerce category page).
  4. If you’re already on this page, reload it.
  5. Download the file that you can now find in the wp-content folder using FTP. The file is called debug.log.
  6. Send the file (or the content of the file) to your support staff.

If you don’t get a debug.log file, the issue maybe not related to SNIP but to another plugin or theme, too.

Which schemas do I need?

From time to time, people ask me what schemas I would recommend. The answer is: you need to decide that yourself. Since Structured Data is part of technical SEO, it depends on your plans on your overall holistic SEO strategy. Here are a few tips.

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How to add your own loop

Ivan sent a message over Twitter and asked how to get breadcrumbs to work with tags. As you may know from the How to use Loops to iterate over items tutorial, it’s pretty simple with categories because they’re hierarchical. That’s not the case with tags. So it lead me to this blog post which shows how you can create your own loop.

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Can I get a discount?

From time to time people are asking for a discount. To make it short: I’m afraid I can’t offer you any discounts due to technical reasons. Read on to learn more about this.

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How to renew your support

If you bought SNIP on CodeCanyon, you subscribed to a 6-month (or optionally to a 12 month) support plan that expires automatically after that time. After that you need to renew your support in order to get one-to-one support via E-Mail. Here is how you can do that.

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How can I remove duplicate Structured Data?

Lots of customers didn’t recognize that they have Structured Data on their site. But when they install SNIP, the Structured Data WordPress Plugin, they check their sites using Googles Structured Data Test Tool and they suddenly recognize that there are other schemas, maybe duplicate ones, that they now want to remove. Here is how you can detect those and how they can be removed.

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How to use a certain post thumbnail size

Bill asked me today how it’s possible to use a certain post thumbnail size in SNIP. Unfortunately that is not possible at the moment directly within SNIP. However there is a workaround that extends its functionality. And here is how it works:

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Schema for WooCommerce: The Ultimate Guide

The time has come: nobody can avoid structured data anymore. It’s part of technical SEO. I wrote a lot about it in the past but in this blog post I want to focus on Schema for WooCommerce. Hopefully you can learn a lot about it and you are able to create your own snippets after that. Have fun!

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How to deactivate Structured Data Generation in Yoast SEO

Yoast SEO has started to integrate Structured Data in version 11.0. However it’s still not possible to create your own schemas without the knowledge of the programming language PHP. If you want to totally remove Structured Data generated by the plugin, follow the instructions below. In the end I also clarify how it’s possible to remove Structured Data generated by Yoast SEO for WooCommerce plugin.

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How to Exclude Structured Data on certain Posts

Of course you can exclude Structured Data on certain posts (pages and custom post types), too. It’s super easy (see down below). However I would not recommend to use this functionality very often as it messes up your ruleset-metabox and therefore it quickly gets very complicated.

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How to use stamped.io ratings in Structured Data with SNIP

A customer asked how he can use stamped.io review ratings for an AggregateRating for his WooCommerce products. Here is how it works:


As far as I know you need to use stamped.io’s WordPress Plugin. It fetches all the ratings from their API and buffers it into the WordPress post meta database table. SNIP can access this data.

First of all you need to follow the example on how to work with custom fields. The configuration of the AggregateRating schema is a little different.

You can use the following values:

  • ratingValue: Post meta field “stamped_io_product_reviews_new->rating”
  • bestRating: Direct Text Input “5”
  • reviewCount: Post meta field “stamped_io_product_reviews_new->count”
  • worstRating: Direct Text Input “1”

That’s it! Have fun! 😉