wp tax_query in

The tax_query parameter in WordPress is used to filter posts by taxonomy terms. Here's an explanation for each step in using tax_query:

1. Declare the tax_query parameter within the arguments of the WP_Query class.
2. Inside tax_query, specify an array of arrays to define the taxonomy query. Each inner array represents a single taxonomy query.
3. Each inner array should include the following parameters:
4. taxonomy: Specify the taxonomy to query.
5. field: Define the field to be used for comparison (e.g., "term_id", "name", "slug", "term_taxonomy_id", "description").
6. terms: Specify the term(s) to include.
7. operator: Define the relationship between multiple conditions (e.g., "IN", "NOT IN", "AND", "EXISTS").
8. include_children: (optional) Set to true to include child terms.

Example:

$args = array(
    'post_type' => 'post',
    'tax_query' => array(
        array(
            'taxonomy' => 'category',
            'field' => 'slug',
            'terms' => 'news'
        ),
        array(
            'taxonomy' => 'post_tag',
            'field' => 'term_id',
            'terms' => array( 47, 49 ),
            'operator' => 'NOT IN'
        )
    )
);
$query = new WP_Query( $args );