Merge branch 'tinify:master' into master

Author: tijmenbruggeman

bin/check-version

@@ -9,10 +9,16 @@ TAG_VERSION="${1:-${GITHUB_REF#refs/tags/}}"
 
 # Stable tag from readme.txt
 README_VERSION=$(grep -m 1 "^Stable tag:" readme.txt | awk '{print $3}')
+SOURCE_VERSION=$(grep "Version:" tiny-compress-images.php | head -n 1 | cut -d ':' -f 2 | xargs)
 
 if [ "$TAG_VERSION" != "$README_VERSION" ]; then
     echo "Error: Tag: $TAG_VERSION, readme.txt: $README_VERSION"
     exit 1
 fi
 
+if [ "$TAG_VERSION" != "$SOURCE_VERSION" ]; then
+    echo "Error: Tag: $TAG_VERSION, tiny-compress-images.php: $SOURCE_VERSION"
+    exit 1
+fi
+
 echo "Version matches git release"

readme.txt

@@ -4,7 +4,7 @@ Donate link: https://tinypng.com/
 Tags: compress images, compression, image size, page speed, performance
 Requires at least: 4.0
 Tested up to: 6.9
-Stable tag: 3.6.11
+Stable tag: 3.6.12
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -174,6 +174,10 @@ A: You can upgrade to a paid account by adding your *Payment details* on your [a
 A: When the conversion feature is enabled (to convert images to AVIF or WebP), each image will use double the number of credits: one for compression and one for format conversion.
 
 == Changelog ==
+= 3.6.12 =
+* chore: updated tiny package to 1.6.4
+* fix: resolved warning when img tag was missing src attribute
+
 = 3.6.9 =
 * fix: prevent picture element on product pages (WooCommerce)
 

src/class-tiny-picture.php

@@ -195,6 +195,10 @@ private function filter_images( $content ) {
 		}
 		$images = array();
 		foreach ( $matches[0] as $img ) {
+			// Skip images without src or srcset
+			if ( ! preg_match( '/\b(?:src|srcset)\s*=/i', $img ) ) {
+				continue;
+			}
 			$images[] = new Tiny_Source_Image(
 				$img,
 				$this->base_dir,

src/class-tiny-source-base.php

@@ -189,7 +189,10 @@ protected function create_alternative_sources( $original_source_html ) {
 		$srcsets = $this->get_image_srcsets( $original_source_html );
 		if ( empty( $srcsets ) ) {
 			// no srcset, try src attribute
-			$srcsets[] = $this->get_image_src( $original_source_html );
+			$src = $this->get_image_src( $original_source_html );
+			if ( ! empty( $src ) ) {
+				$srcsets[] = $src;
+			}
 		}
 
 		if ( empty( $srcsets ) ) {

test/unit/TinyPictureTest.php

@@ -354,4 +354,28 @@ public function test_does_not_register_hooks_when_pagebuilder_request()
 
         $_GET = array();
     }
+
+    /**
+     * images that have no src or srcset will be unchanged
+     */
+    public function test_image_without_src() {
+        $input = '<img alt="no source">';
+        $expected = '<img alt="no source">';
+        $output = $this->tiny_picture->replace_sources($input);
+
+        $this->assertSame($expected, $output);
+    }
+
+    /**
+     * Images with only a srcset are valid and will be wrapped
+     */
+    public function test_image_with_only_srcset() {
+        $this->wp->createImage(37857, '2025/09', 'test_250x250.webp');
+
+        $input = '<img srcset="/wp-content/uploads/2025/09/test_250x250.png 350w" alt="no source but has srcset">';
+        $expected = '<picture><source srcset="/wp-content/uploads/2025/09/test_250x250.webp 350w" type="image/webp" /><img srcset="/wp-content/uploads/2025/09/test_250x250.png 350w" alt="no source but has srcset"></picture>';
+        $output = $this->tiny_picture->replace_sources($input);
+
+        $this->assertSame($expected, $output);
+    }
 }

tiny-compress-images.php

@@ -2,7 +2,7 @@
 /**
  * Plugin Name: TinyPNG - JPEG, PNG & WebP image compression
  * Description: Speed up your website. Optimize your JPEG, PNG, and WebP images automatically with TinyPNG.
- * Version: 3.6.11
+ * Version: 3.6.12
  * Author: TinyPNG
  * Author URI: https://tinypng.com
  * Text Domain: tiny-compress-images