move the regex pattern to the private constant issue 24068

Author: edenduong

lib/internal/Magento/Framework/View/Element/Html/Link/Current.php

@@ -23,6 +23,11 @@
  */
 class Current extends Template
 {
+    /**
+     * Search redundant /index and / in url
+     */
+    private const REGEX_INDEX_URL_PATTERN = '/(\/index|(\/))+($|\/$)/';
+
     /**
      * Default path
      *
@@ -88,8 +93,8 @@ private function getMca()
     public function isCurrent()
     {
         return $this->getCurrent() ||
-            preg_replace('/(\/index|(\/))+($|\/$)/', '', $this->getUrl($this->getPath()))
-            == preg_replace('/(\/index|(\/))+($|\/$)/', '', $this->getUrl($this->getMca()));
+            preg_replace(self::REGEX_INDEX_URL_PATTERN, '', $this->getUrl($this->getPath()))
+            == preg_replace(self::REGEX_INDEX_URL_PATTERN, '', $this->getUrl($this->getMca()));
     }
 
     /**