From cda7fb706b91ce11e8b2a0b753280105a5eb9e30 Mon Sep 17 00:00:00 2001
From: ericek111 <erik.brocko@letemsvetemapplem.eu>
Date: Wed, 8 Sep 2021 17:12:26 +0200
Subject: [PATCH 1/2] Fix sRGB chunk crashing the lib, default to 'Unknown'

---
 src/PNGMetadata.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/PNGMetadata.php b/src/PNGMetadata.php
index cef77a9..2a8e6e6 100644
--- a/src/PNGMetadata.php
+++ b/src/PNGMetadata.php
@@ -448,7 +448,7 @@ private function extractRBG(): void
 		if (isset($this->chunks['sRGB'])) {
 			$rbg = ['Perceptual', 'Relative Colorimetric', 'Saturation', 'Absolute Colorimetric'];
 			$unpacked = unpack('C', $this->chunks['sRGB']);
-			$this->metadata['sRBG'] = $rbg[end(...$unpacked)];
+			$this->metadata['sRBG'] = $rbg[end($unpacked)] ?? 'Unknown';
 		}
 	}
 

From 70ac261a9c304cf7ec173bdaa3192ae1d3c3e003 Mon Sep 17 00:00:00 2001
From: ericek111 <erik.brocko@letemsvetemapplem.eu>
Date: Wed, 8 Sep 2021 17:17:38 +0200
Subject: [PATCH 2/2] Change all references of 'RBG' to '(s)RGB'

---
 README.md           |  2 +-
 src/PNGMetadata.php | 12 ++++++------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 1df7164..d805adf 100644
--- a/README.md
+++ b/README.md
@@ -83,7 +83,7 @@ echo $png_metadata->get('exif:DateTime'); // Return a value, a array or false.
 
 ### Example 3 - Types
 
-Print the metadata types (IHDR, SRBG, BKGD, EXIF, XMP, CRS, DATE, DC, ICC, AUX, ...).
+Print the metadata types (IHDR, sRGB, BKGD, EXIF, XMP, CRS, DATE, DC, ICC, AUX, ...).
 
 ```php
 $png_metadata = new PNGMetadata('./Path/Photo.png');
diff --git a/src/PNGMetadata.php b/src/PNGMetadata.php
index 2a8e6e6..70e617b 100644
--- a/src/PNGMetadata.php
+++ b/src/PNGMetadata.php
@@ -26,7 +26,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * PNG Metadata class for extraction of XMP, TEXIF, EXIF, BKGD, RBG and IHDR.
+ * PNG Metadata class for extraction of XMP, TEXIF, EXIF, BKGD, sRGB and IHDR.
  *
  * Returns the complete information found in the different types
  * of metadata within a PNG format image.
@@ -91,7 +91,7 @@ public function __construct(string $path)
 		$this->extractTExif();
 		$this->extractExif();
 		$this->extractBKGD();
-		$this->extractRBG();
+		$this->extractRGB();
 		$this->extractIHDR();
 		ksort($this->metadata);
 
@@ -438,17 +438,17 @@ private function extractBKGD(): void
 
 
 	/**
-	 * Extract RBG type from sRBG chunk as a array.
+	 * Extract RGB type from sRGB chunk as a array.
 	 *
 	 * @see PNGMetadata::$metadata For the property whose metadata are storage.
 	 * @see PNGMetadata::$chunks For the property whose chunks data are storage.
 	 */
-	private function extractRBG(): void
+	private function extractRGB(): void
 	{
 		if (isset($this->chunks['sRGB'])) {
-			$rbg = ['Perceptual', 'Relative Colorimetric', 'Saturation', 'Absolute Colorimetric'];
+			$rgb = ['Perceptual', 'Relative Colorimetric', 'Saturation', 'Absolute Colorimetric'];
 			$unpacked = unpack('C', $this->chunks['sRGB']);
-			$this->metadata['sRBG'] = $rbg[end($unpacked)] ?? 'Unknown';
+			$this->metadata['sRGB'] = $rgb[end($unpacked)] ?? 'Unknown';
 		}
 	}