Added some exception handling.

Author: Martin Brecht-Precht

QrRender/QrCodeRendererEps.php

@@ -73,7 +73,10 @@ public function render(QrCode $qrCode, $filename)
 		$epsSource[] = 'eofill';
 		$epsSource[] = '%%EOF';
 
-		file_put_contents($filename, implode("\n", $epsSource));
+		$bytes = @file_put_contents($filename, implode("\n", $epsSource));
+		if ($bytes === false) {
+			throw new IoException('QR code output file not writable.');
+		}
 	}
 
 	/**

QrRender/QrCodeRendererPng.php

@@ -64,9 +64,13 @@ public function render(QrCode $qrCode, $filename)
 		$canvas->drawImage($draw);
 
 		// Write out the image
-		$canvas->writeImage($filename);
+		$writeSuccess = @$canvas->writeImage($filename);
 		$canvas->clear();
 		$canvas->destroy();
+
+		if($writeSuccess !== true){
+			throw new IoException('QR code output file not writable.');
+		}
 	}
 
 }

QrRender/QrCodeRendererTiff.php

@@ -67,11 +67,15 @@ public function render(QrCode $qrCode, $filename)
 		}
 
 		// Write out the image
-		$canvas->writeImage($filename);
+		$writeSuccess = @$canvas->writeImage($filename);
 		$canvas->clear();
 		$canvas->destroy();
 		$block->clear();
 		$block->destroy();
+
+		if ($writeSuccess !== true) {
+			throw new IoException('QR code output file not writable');
+		}
 	}
 
 }