From d791a0bbeb54bf6ce8ad2efe8843852f7ea41659 Mon Sep 17 00:00:00 2001
From: Enyby <Enyby@users.noreply.github.com>
Date: Fri, 30 Sep 2016 23:55:28 +0300
Subject: [PATCH] Fix signature detection on Excel2003XML

Signature can be with single quotes:
```
<?xml version='1.0'?>
<?mso-application progid='Excel.Sheet'?>
```
---
 src/PhpSpreadsheet/Reader/Excel2003XML.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/PhpSpreadsheet/Reader/Excel2003XML.php b/src/PhpSpreadsheet/Reader/Excel2003XML.php
index b52c1069..06bcdeee 100644
--- a/src/PhpSpreadsheet/Reader/Excel2003XML.php
+++ b/src/PhpSpreadsheet/Reader/Excel2003XML.php
@@ -82,6 +82,7 @@ class Excel2003XML extends BaseReader implements IReader
         // Read sample data (first 2 KB will do)
         $data = fread($fileHandle, 2048);
         fclose($fileHandle);
+        $data = strtr($data, "'", '"'); // fix headers with single quote
 
         $valid = true;
         foreach ($signature as $match) {