Merge pull request #895 from art-institute-of-chicago/fix/slug-encoding

Prevent guessing of slug encoding [ART-81]

Author: zachgarwood

app/Helpers/StringHelpers.php

@@ -10,20 +10,21 @@ class StringHelpers
      */
     public static function getUtf8Slug($str, $options = [])
     {
-        // Make sure string is in UTF-8 and strip invalid UTF-8 characters
-        $str = mb_convert_encoding((string) $str, 'UTF-8', mb_list_encodings());
-
         $defaults = [
             'delimiter' => '-',
             'limit' => null,
             'lowercase' => true,
             'replacements' => [],
             'transliterate' => true,
+            'from_encoding' => null,
         ];
 
         // Merge options
         $options = array_merge($defaults, $options);
 
+        // Make sure string is in UTF-8 and strip invalid UTF-8 characters
+        $str = mb_convert_encoding((string) $str, 'UTF-8', $options['from_encoding']);
+
         $char_map = [
             // Latin
             'À' => 'A', 'Á' => 'A', 'Â' => 'A', 'Ã' => 'A', 'Ä' => 'A', 'Å' => 'A', 'Æ' => 'AE', 'Ç' => 'C',