From 67581a0dd52e9ad27ca92ce23753b19fc82ac7cb Mon Sep 17 00:00:00 2001
From: Ivan Bragin <vaner@bk.ru>
Date: Fri, 14 Apr 2017 18:54:37 +0700
Subject: [PATCH] Fallback from iconv to mbstring for encoding convertion

In some exotic environnement (IBM AIX) it may happens that `//TRANSLIT` is not supported. In that case iconv would return false. We can easily identify the case and fallback on mbstring instead. That should give correct result.

Closes #135
Closes #136
---
 src/PhpSpreadsheet/Shared/StringHelper.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/PhpSpreadsheet/Shared/StringHelper.php b/src/PhpSpreadsheet/Shared/StringHelper.php
index c4945540..2273333d 100644
--- a/src/PhpSpreadsheet/Shared/StringHelper.php
+++ b/src/PhpSpreadsheet/Shared/StringHelper.php
@@ -468,7 +468,10 @@ class StringHelper
     public static function convertEncoding($value, $to, $from)
     {
         if (self::getIsIconvEnabled()) {
-            return iconv($from, $to . '//IGNORE//TRANSLIT', $value);
+            $result = iconv($from, $to . '//IGNORE//TRANSLIT', $value);
+            if (false !== $result) {
+                return $result;
+            }
         }
 
         return mb_convert_encoding($value, $to, $from);