Using URL variables on a custom WP_Query

Question

Using URL variables on a custom WP_Query

Andy Cheeseman

2022年4月19日 15:29

Background

I have a page with a custom template 'listen', with a custom wp_query running on it...

$custom_query_args = array(
    'post_type' = 'post',
    'tax_query' = array(
        array(
            'taxonomy' = 'post_format',
            'field'    = 'slug',
            'terms'    = array( 'post-format-audio' ),
        ),
    ),
);

The Problem

When I try and filter the posts on this page with url variables (example.com/listen/?category_name=thebigshow), nothing changes, even if I spell the category name incorrectly.

How can I use this method to filter the 'listen' page, by 'category_name' (show name)?

Thanks, Andy.

Topic page-template wp-query urls query Wordpress

Category Web

thomascharbit · Accepted Answer · 2022年4月19日 15:29

WordPress doesn't handle this logic qutomatically so you will have do do it manually.

What you need to do is:

Read the url parameter with get_query_var( 'category_name' );

injects it in your custom WP_Query:

 $custom_query_args = array(
     'post_type' => 'post',
     'tax_query' => array(
         'relation' => 'AND',
         array(
             'taxonomy' => 'post_format',
              'field'    => 'slug',
              'terms'    => array( 'post-format-audio' ),
          ),
         array(
             'taxonomy' => 'category',
              'field'    => 'slug',
              'terms'    => get_query_var( 'category_name' ),
          )
      )
 );

Note that if you decide to pass an arbitrary variable instead of category_name, you will need to declare it before using it.

See https://developer.wordpress.org/reference/functions/get_query_var/

Using URL variables on a custom WP_Query

Background

The Problem

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