From 70c81e809f9b31b628b3bbbaad17464339749d45 Mon Sep 17 00:00:00 2001
From: Pavel Zyukin <p.zyukin@gmail.com>
Date: Fri, 3 Jun 2016 19:09:37 +0400
Subject: [PATCH] Add the ability to pass an array with various keys to
 addRows() (#240)

---
 src/Spout/Writer/AbstractWriter.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Spout/Writer/AbstractWriter.php b/src/Spout/Writer/AbstractWriter.php
index effa45b..e5f9ad7 100644
--- a/src/Spout/Writer/AbstractWriter.php
+++ b/src/Spout/Writer/AbstractWriter.php
@@ -238,7 +238,8 @@ abstract class AbstractWriter implements WriterInterface
     public function addRows(array $dataRows)
     {
         if (!empty($dataRows)) {
-            if (!is_array($dataRows[0])) {
+            $firstRow = reset($dataRows);
+            if (!is_array($firstRow)) {
                 throw new InvalidArgumentException('The input should be an array of arrays');
             }