rest_query_var-(key) │ filter-hook │ WP 4.7.0

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

Usage

add_filter( 'rest_query_var-(key)', 'wp_kama_rest_query_var_key_filter' );

/**
 * Function for `rest_query_var-(key)` filter-hook.
 * 
 * @param string $value The query_var value.
 *
 * @return string
 */
function wp_kama_rest_query_var_key_filter( $value ){

	// filter...
	return $value;
}

$value(string)

The query_var value.

Changelog

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 WordPress