diff --git a/init.php b/init.php
index d3ef00c7..de0dc6a0 100644
--- a/init.php
+++ b/init.php
@@ -222,7 +222,7 @@ function Lang($key)
 
 function alphanumeric($str, $tambahan = "")
 {
-    return preg_replace("/[^a-zA-Z0-9" . $tambahan . "]+/", "", $str);
+    return Text::alphanumeric($str, $tambahan);
 }
 
 function showResult($success, $message = '', $result = [], $meta = [])
diff --git a/system/autoload/Text.php b/system/autoload/Text.php
new file mode 100644
index 00000000..bc094e15
--- /dev/null
+++ b/system/autoload/Text.php
@@ -0,0 +1,64 @@
+<?php
+
+/**
+ *  PHP Mikrotik Billing (https://github.com/hotspotbilling/phpnuxbill/)
+ *  by https://t.me/ibnux
+ *
+ *  This file is for Text Transformation
+ **/
+
+class Text
+{
+
+    public static function toHex($string)
+    {
+        return "\x" . implode("\x", str_split(array_shift(unpack('H*', $string)), 2));
+    }
+
+    public static function alphanumeric($str, $tambahan = "")
+    {
+        return preg_replace("/[^a-zA-Z0-9" . $tambahan . "]+/", "", $str);
+    }
+
+    public static function numeric($str)
+    {
+        return preg_replace("/[^0-9]+/", "", $str);
+    }
+
+    public static function ucWords($text)
+    {
+        return ucwords(str_replace('_', ' ', $text));
+    }
+
+    public static function randomUpLowCase($text)
+    {
+        $jml = strlen($text);
+        $result = '';
+        for ($i = 0; $i < $jml; $i++) {
+            if (rand(0, 99) % 2) {
+                $result .= strtolower(substr($text, $i, 1));
+            } else {
+                $result .= substr($text, $i, 1);
+            }
+        }
+        return $result;
+    }
+
+    public static function maskText($text){
+        $len = strlen($text);
+        if($len < 3){
+            return "***";
+        }else if($len<5){
+            return substr($text,0,1)."***".substr($text,-1,1);
+        }else if($len<8){
+            return substr($text,0,2)."***".substr($text,-2,2);
+        }else{
+            return substr($text,0,4)."******".substr($text,-3,3);
+        }
+    }
+
+    public static function sanitize($str)
+    {
+        return preg_replace("/[^A-Za-z0-9]/", '_', $str);;
+    }
+}
diff --git a/ui/ui/user-dashboard.tpl b/ui/ui/user-dashboard.tpl
index 085341bf..e106275a 100644
--- a/ui/ui/user-dashboard.tpl
+++ b/ui/ui/user-dashboard.tpl
@@ -187,7 +187,7 @@
                                 {if $_bill['status'] != 'on' && $_bill['prepaid'] != 'yes' && $_c['extend_expired']}
                                     <a class="btn btn-warning text-black btn-sm"
                                         href="{$_url}home&extend={$_bill['id']}&stoken={App::getToken()}"
-                                        onclick="return confirm('{str_replace("\n","\\n",str_replace("\r","",$_c['extend_confirmation']))}')">{Lang::T('Extend')}</a>
+                                        onclick="return confirm('{Text::toHex($_c['extend_confirmation'])}')">{Lang::T('Extend')}</a>
                                 {/if}
                                 <a class="btn btn-primary pull-right  btn-sm"
                                     href="{$_url}home&recharge={$_bill['id']}&stoken={App::getToken()}"