fix: simplify the fix

src/Formatter.php

@@ -190,9 +190,6 @@ public static function nameCase(?string $name = '', ?array $options = []): strin
 
         self::setOptions($options);
 
-        // Temporarily replace HTML encoded entities with placeholders
-        $placeholders = self::replaceHtmlEntitiesWithPlaceholders($name);
-
         // Do not do anything if string is mixed and lazy option is true.
         if ( ! self::canBeProcessed($name)) {
             return $name;
@@ -219,8 +216,7 @@ public static function nameCase(?string $name = '', ?array $options = []): strin
 
         self::processOptions($name);
 
-        // After name casing operations, restore HTML encoded entities
-        self::restoreHtmlEntitiesFromPlaceholders($name, $placeholders);
+        self::adjustHTMLEntities($name);
 
         return $name;
     }
@@ -421,35 +417,14 @@ private static function fixPostNominal(string &$name): void
     }
 
     /**
-     * Replace HTML entities with placeholders.
+     * Decode HTML entities.
      *
      * @param string $name
-     * @return array
      */
-    private static function replaceHtmlEntitiesWithPlaceholders(string &$name): array {
-        $placeholders = [];
-        $counter = 0;
-
-        $name = preg_replace_callback('/&[a-zA-Z0-9#]+;/i', function($matches) use (&$placeholders, &$counter) {
-            $placeholder = mb_strtolower('HTML_ENTITY_PLACEHOLDER_' . $counter++. ' '); // note space at the end, to avoid merging with the next word
-            $placeholders[$placeholder] = $matches[0];
-            return $placeholder;
+    private static function adjustHTMLEntities(string &$name): void
+    {
+        $name = mb_ereg_replace_callback('&[a-zA-Z0-9#]+;', function ($matches) {
+            return mb_strtolower($matches[0]);
         }, $name);
-
-        return $placeholders;
     }
-
-    /**
-     * Restore HTML entities.
-     *
-     * @param string $name
-     * @param array $placeholders
-     * @return void
-     */
-    private static function restoreHtmlEntitiesFromPlaceholders(string &$name, array $placeholders): void {
-        foreach ($placeholders as $placeholder => $entity) {
-            $name = preg_replace('/' . preg_quote($placeholder, '/') . '/i', $entity, $name);
-        }
-    }
-
 }