query_vars │ filter-hook │ WC 1.0

Filter the publicly allowed query vars.

Allows adjusting of the default query vars that are made public.

Usage

add_filter( 'query_vars', 'wp_kama_query_vars_filter' );

/**
 * Function for `query_vars` filter-hook.
 * 
 * @param string[] $public_query_vars The array of allowed query variable names.
 *
 * @return string[]
 */
function wp_kama_query_vars_filter( $public_query_vars ){

	// filter...
	return $public_query_vars;
}

$public_query_vars(string[])

The array of allowed query variable names.

Where the hook is called

$valid_vars = apply_filters( 'query_vars', $wp->public_query_vars );

Where the hook is used in WooCommerce

add_filter( 'query_vars', array( $this, 'add_custom_query_var' ) );

add_filter( 'query_vars', array( $this, 'add_custom_query_var' ) );

add_filter( 'query_vars', array( $this, 'add_query_vars' ), 0 );

add_filter( 'query_vars', array( $this, 'add_query_vars' ), 0 );

add_filter( 'query_vars', array( $this, 'add_query_vars' ), 0 );

add_filter( 'query_vars', array( $this, 'set_query_vars' ) );

self::add_filter( 'query_vars', array( $this, 'handle_query_vars' ), 0 );