From a1177ef83d7436cfcc5bf2bd6f5ca0960c0fd335 Mon Sep 17 00:00:00 2001
From: Cees van Egmond <cees.vanegmond@wearejust.com>
Date: Mon, 9 Oct 2017 09:17:06 +0200
Subject: [PATCH] Bugfix: Correctly strip base64 prefix

---
 Form/DataTransformer/Base64ToImageTransformer.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Form/DataTransformer/Base64ToImageTransformer.php b/Form/DataTransformer/Base64ToImageTransformer.php
index c736754..8d1c83f 100644
--- a/Form/DataTransformer/Base64ToImageTransformer.php
+++ b/Form/DataTransformer/Base64ToImageTransformer.php
@@ -35,8 +35,8 @@ public function reverseTransform($value)
             return null;
         }
 
-
-        $base64 = preg_replace('/data:.*;base64,/', '', $value['base64']);
+        $prefixLenght = strpos($value['base64'], 'base64,') + 7;
+        $base64 = substr($value['base64'], $prefixLenght);
 
         $filePath = tempnam(sys_get_temp_dir(), 'UploadedFile');
         $file = fopen($filePath, 'w');