From de3b4f2593c07f632d225564c2211b10b4171ac3 Mon Sep 17 00:00:00 2001
From: Eric van der Vlist <vdv@dyomedea.com>
Date: Sat, 9 May 2020 17:46:21 +0200
Subject: [PATCH] Checking array indexes before using them (#1)

---
 wp-gpx-maps_utils_nggallery.php | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/wp-gpx-maps_utils_nggallery.php b/wp-gpx-maps_utils_nggallery.php
index b4ad7e6..5b88078 100644
--- a/wp-gpx-maps_utils_nggallery.php
+++ b/wp-gpx-maps_utils_nggallery.php
@@ -39,8 +39,10 @@ function getNGGalleryImages( $ngGalleries, $ngImages, $dt, $lat, $lon, $dtoffset
 			if ( is_callable( 'exif_read_data' ) ) {
 				$exif = @exif_read_data( $p->imagePath );
 				if ( $exif !== false ) {
-					$item['lon'] = getExifGps( $exif['GPSLongitude'], $exif['GPSLongitudeRef'] );
-					$item['lat'] = getExifGps( $exif['GPSLatitude'], $exif['GPSLatitudeRef'] );
+					$item['lon'] = (array_key_exists('GPSLongiture', $exif) and array_key_exists('GPSLongitudeRef', $exif)) ? 
+                                                getExifGps( $exif['GPSLongitude'], $exif['GPSLongitudeRef'] ) : 0;
+					$item['lat'] = (array_key_exists('GPSLatitude', $exif) and array_key_exists('GPSLatitudeRef', $exif)) ? 
+                                                getExifGps( $exif['GPSLatitude'], $exif['GPSLatitudeRef'] ) : 0;
 					if ( ( $item['lat'] != 0 ) || ( $item['lon'] != 0 ) ) {
 						$result[] = $item;
 					} elseif ( isset( $p->imagedate ) ) {