WP::add_query_var( string $qv )

Adds a query variable to the list of public query variables.

Parameters

$qv

(string) (Required) Query variable name.

Source

File: wp-includes/class-wp.php 

public function add_query_var( $qv ) {
		if ( ! in_array( $qv, $this->public_query_vars, true ) ) {
			$this->public_query_vars[] = $qv;
		}
	}

Used By

Used By Description
wp-includes/class-wp-taxonomy.php: WP_Taxonomy::add_rewrite_rules()

Adds the necessary rewrite rules for the taxonomy.
wp-includes/class-wp-post-type.php: WP_Post_Type::add_rewrite_rules()

Adds the necessary rewrite rules for the post type.
wp-includes/rest-api.php: rest_api_init()

Registers rewrite rules for the REST API.
wp-includes/class-wp-rewrite.php: WP_Rewrite::add_endpoint()

Adds an endpoint, like /trackback/.
wp-includes/rewrite.php: add_rewrite_tag()

Add a new rewrite tag (like %postname%).

Changelog

Version Description
2.1.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/wp/add_query_var