From f55859ceba856e3890e1e2775b68d1d60e6c258d Mon Sep 17 00:00:00 2001
From: Josh <josh@blobfolio.com>
Date: Fri, 16 Dec 2016 22:18:14 -0800
Subject: [PATCH] Throw Exception on cachefile write error

---
 src/Output/QRImage.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Output/QRImage.php b/src/Output/QRImage.php
index 7a5d1cdae..0691d124e 100644
--- a/src/Output/QRImage.php
+++ b/src/Output/QRImage.php
@@ -166,7 +166,9 @@ class QRImage extends QROutputAbstract{
 
 		// if saving to file, append the correct headers
 		if($this->options->cachefile){
-			@file_put_contents($this->options->cachefile, '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">' . "\n" . $imageData);
+			if(false === @file_put_contents($this->options->cachefile, '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">' . "\n" . $imageData)){
+				throw new QRCodeOutputException('Could not write to cache file.');
+			}
 		}
 
 		if((bool)$this->options->base64){