WooCommerce: Detect if Current Category is a Subcategory

A client of mine had to style a WooCommerce product category page but ONLY if it was a subcategory. So I decided to add a “subcategory” class to the HTML body, so that they could target this in their custom CSS.

As usual, the PHP is quite easy: I check if the current page is a product category, then if the category has “parents” – and only in this case – add a body class. Pretty easy!

WooCommerce: detect if current page is a subcategory

PHP Snippet 1: Add Body Class if Current Page is a Subcategory – WooCommerce

/**
 * @snippet 	   Add "Subcategory" Class to HTML Body
 * @how-to 	      Get CustomizeWoo.com FREE
 * @author 	      Rodolfo Melogli
 * @compatible    WooCommerce 5
 * @donate $9     https://businessbloomer.com/bloomer-armada/
 */
 
add_filter( 'body_class', 'bbloomer_wc_product_cats_css_body_class' );

function bbloomer_wc_product_cats_css_body_class( $classes ){
   if ( is_tax( 'product_cat' ) ) {
      $cat = get_queried_object();
      if ( $cat->parent > 0  ) $classes[] = 'subcategory';
   }
   return $classes;
}

PHP Snippet 2: Detect if Current Subcategory Page Belongs To a Specific Parent Category – WooCommerce

As you can see inside the first snippet, there is a way to find out if the current object (a product category in this case) has a parent. You can apply the same method for other conditional work.

In this case study, however, I want to check if the subcategory ID is a child of a specific product category ID, so that I can run PHP only if this condition is met.

/**
 * @snippet 	   Check If Subcategory is Child Of Category ID
 * @how-to 	      Get CustomizeWoo.com FREE
 * @author 	      Rodolfo Melogli
 * @compatible    WooCommerce 5
 * @donate $9     https://businessbloomer.com/bloomer-armada/
 */
 
$cat = get_queried_object();
if ( $cat->parent === 456  ) {
   // do something if parent term id is 456
}

PHP Snippet 3: Detect if Current Subcategory Page Belongs To a Specific Ancestor Category – WooCommerce

Not only you can detect if a subcategory belongs to a parent category, but also grandparent, great grandparents and so on…

/**
 * @snippet 	   Check If Subcategory Has Category ID Ancestor
 * @how-to 	      Get CustomizeWoo.com FREE
 * @author 	      Rodolfo Melogli
 * @compatible    WooCommerce 5
 * @donate $9     https://businessbloomer.com/bloomer-armada/
 */
 
$cat_id = get_queried_object_id();
$ancestors = get_ancestors( $cat_id, 'product_cat' );
if ( in_array( 456, $ancestors ) ) {
   // do something if term id 456 is an ancestor
}

Where to add this snippet?

You can place PHP snippets at the bottom of your child theme functions.php file (delete "?>" if you have it there). CSS, on the other hand, goes in your child theme style.css file. Make sure you know what you are doing when editing such files - if you need more guidance, please take a look at my free video tutorial "Where to Place WooCommerce Customization?"

Does this snippet (still) work?

Please let me know in the comments if everything worked as expected. I would be happy to revise the snippet if you report otherwise (please provide screenshots). I have tested this code with Storefront theme, the WooCommerce version listed above and a WordPress-friendly hosting on PHP 7.3.

If you think this code saved you time & money, feel free to join 14,000+ WooCommerce Weekly subscribers for blog post updates or 250+ Business Bloomer supporters for 365 days of WooCommerce benefits. Thank you in advance :)

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Rodolfo Melogli

Business Bloomer Founder

Author, WooCommerce expert and WordCamp speaker, Rodolfo has worked as an independent WooCommerce freelancer since 2011. His goal is to help entrepreneurs and developers overcome their WooCommerce nightmares. Rodolfo loves travelling, chasing tennis & soccer balls and, of course, wood fired oven pizza.

6 thoughts on “WooCommerce: Detect if Current Category is a Subcategory

  1. Thank you Rodolfo for the great contribution you constantly make!

    I just wanted to mention that snippet 3 does not work because the taxonomy “product_category” is incorrect, it has to be “product_cat”.

  2. Perfect solution, thanks!
    Is there a reason to put

    if (0<expression)

    instead of just

    if (expression)

    ) ?

    1. Hey Francisco, if there is no parent it will return 0, so I’m checking it’s a subcategory when it’s > 0

      1. Hey there Rodolfo, in regards to snippet 1, is there a way to detect if the subcategory has products associated with it or not? Not sure what code modification it would take.

        1. Hi Ryan, thanks so much for your comment! Yes, this is definitely possible, but I’m afraid it’s custom work. If you’d like to get a quote, feel free to contact me here. Thanks a lot for your understanding!

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