From fdfd36cc04d502a7afcae5f5f54cdfd987889c9e Mon Sep 17 00:00:00 2001
From: David de Boer <david@ddeboer.nl>
Date: Mon, 8 Sep 2014 17:16:31 +0200
Subject: [PATCH] Improve sheet index error handling

Fix 'Undefined offset: -1' warning, thrown when worksheets could
not be parsed and _activeSheetIndex equals -1.
---
 Classes/PHPExcel.php | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/Classes/PHPExcel.php b/Classes/PHPExcel.php
index e01581a..27aa77a 100644
--- a/Classes/PHPExcel.php
+++ b/Classes/PHPExcel.php
@@ -461,10 +461,12 @@ class PHPExcel
      * Get active sheet
      *
      * @return PHPExcel_Worksheet
+     *
+     * @throws PHPExcel_Exception
      */
     public function getActiveSheet()
     {
-        return $this->_workSheetCollection[$this->_activeSheetIndex];
+        return $this->getSheet($this->_activeSheetIndex);
     }
 
     /**
@@ -570,16 +572,14 @@ class PHPExcel
      */
     public function getSheet($pIndex = 0)
     {
-
-        $numSheets = count($this->_workSheetCollection);
-
-        if ($pIndex > $numSheets - 1) {
+        if (!isset($this->_workSheetCollection[$pIndex])) {
+            $numSheets = $this->getSheetCount();
             throw new PHPExcel_Exception(
-            	"Your requested sheet index: {$pIndex} is out of bounds. The actual number of sheets is {$numSheets}."
-           	);
-        } else {
-            return $this->_workSheetCollection[$pIndex];
+                "Your requested sheet index: {$pIndex} is out of bounds. The actual number of sheets is {$numSheets}."
+            );
         }
+
+        return $this->_workSheetCollection[$pIndex];
     }
 
     /**
@@ -682,7 +682,7 @@ class PHPExcel
      */
     public function setActiveSheetIndex($pIndex = 0)
     {
-    		$numSheets = count($this->_workSheetCollection);
+        $numSheets = count($this->_workSheetCollection);
 
         if ($pIndex > $numSheets - 1) {
             throw new PHPExcel_Exception(