rest_query_var-(key) filter-hook . WP 4.7.0

Filters the query_vars used in get_items() for the constructed query.

The dynamic portion of the hook name, $key, refers to the query_var key.

Usage

add_filter( 'rest_query_var-(key)', 'filter_function_name_8935' );
function filter_function_name_8935( $value ){
	// filter...

	return $value;
}

$value(string)

The query_var value.

Where the hook is called

$query_args[ $key ] = apply_filters( "rest_query_var-{$key}", $value ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

$query_args[ $key ] = apply_filters( "rest_query_var-{$key}", $value ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

Where the hook is used (in WP core)