woocommerce_email_classes │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_email_classes', 'wp_kama_woocommerce_email_classes_filter' );

/**
 * Function for `woocommerce_email_classes` filter-hook.
 * 
 * @param  $emails 
 *
 * @return 
 */
function wp_kama_woocommerce_email_classes_filter( $emails ){

	// filter...
	return $emails;
}

$emails

-

Where the hook is called

$this->emails = apply_filters( 'woocommerce_email_classes', $this->emails );

Where the hook is used in WooCommerce