From d5177157179fe66d7dc6872e4871e821637392e7 Mon Sep 17 00:00:00 2001
From: iBNu Maksum <me@ibnux.net>
Date: Wed, 21 Oct 2020 14:50:27 +0700
Subject: [PATCH] add - on regex so it not replaced

---
 class.coupon.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/class.coupon.php b/class.coupon.php
index 48d5c5a..6a81efb 100644
--- a/class.coupon.php
+++ b/class.coupon.php
@@ -124,7 +124,7 @@ static private function cleanString($string, $options = []) {
         $toUpper = (isset($options['uppercase']) ? filter_var($options['uppercase'], FILTER_VALIDATE_BOOLEAN) : false);
         $toLower = (isset($options['lowercase']) ? filter_var($options['lowercase'], FILTER_VALIDATE_BOOLEAN) : false);
 
-        $striped = preg_replace('/[^a-zA-Z0-9]/', '', trim($string));
+        $striped = preg_replace('/[^a-zA-Z0-9-]/', '', trim($string));
 
         // make uppercase
         if ($toLower && $toUpper) {