Update DOM crawler to resolver PHP warning

Reviewed-on: CyberCoveLLC/fourth-wall-embed-wp#1

.gitea/workflows/release.yml

@@ -0,0 +1,38 @@
+name: Create Release
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          username: ${{ secrets.CI_USER }}
+          password: ${{ secrets.CI_TOKEN }}
+
+      - name: Get version
+        id: get_version
+        run: |
+          if [ "${{ github.ref_type }}" = "tag" ]; then
+            echo "version=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
+          else
+            echo "version=$(date +'%Y.%m.%d-%H%M')" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Create ZIP archive
+        run: |
+          zip -r fourthwall-store-embed.zip . -x ".git/*" ".gitea/*"
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v2
+        with:
+          token: "${{ secrets.REPO_TOKEN }}"
+          title: Fourthwall-store-embed Release ${{ steps.get_version.outputs.version }}
+          tag_name: ${{ steps.get_version.outputs.version }}
+          files: |
+            fourthwall-store-embed.zip

libs/shortcode.php

@@ -5,8 +5,9 @@ function fwembed_parse_html($url = null) {
     throw new ValueError("Missing URL");
   }
   $html = null;
+  libxml_use_internal_errors(true);
   $dom = new DOMDocument();
-  @$dom->loadHTML(file_get_contents($url));
+  @$dom->loadHTML(loadHTML5(file_get_contents($url)), LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
   $dom->documentURI = $url;
   $divs = $dom->getElementsByTagName('div');
   foreach ($divs as $div) {
@@ -43,9 +44,14 @@ function fwembed_parse_html($url = null) {
       $html = $html . '<div class="product-tile"><a class="product-link" target="_blank" href="' . $url . $linkHref . '">' . $productHTML . '</a></div>';
     }
   }
+  libxml_clear_errors();
   return $html;
 }
 
+function loadHTML5($html) {
+  return '<!DOCTYPE html><html><body>' . $html . '</body></html>';
+}
+
 function fwembed_shortcode( $atts ) {
   $options = get_option( 'fourthwall_settings_name' );
   $value = isset( $options['fourth_url'] ) ? $options['fourth_url'] : 'https://fourthwall.com';