Issue #5443 Use PHP 8 for acceptance tests.

.github/workflows/test-acceptance.yml

@@ -9,9 +9,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        php_version:
+          - "8.0"  # Test with PHP 8.0
+          # Uncomment the line below to also test with PHP 8.4
+          # - "8.4"
         operating_system:
-          - image: docker.io/jrei/systemd-ubuntu:20.04
-          - image: docker.io/jrei/systemd-ubuntu:22.04
+          - image: docker.io/jrei/systemd-ubuntu:20.04  # Base image with PHP 8.0
     runs-on: ubuntu-latest
 
     steps:
@@ -48,6 +51,23 @@ jobs:
           "
         working-directory: ./e107_tests/lib/ci/salt/
 
+      - name: Install PHP and extensions
+        run: |
+          docker exec target apt-get update
+          docker exec target apt-get install -y software-properties-common
+          # Add ondrej/php PPA for PHP 8.4 support (optional)
+          docker exec target add-apt-repository ppa:ondrej/php -y
+          docker exec target apt-get update
+          # Install PHP and required extensions
+          docker exec target apt-get install -y php${{ matrix.php_version }} php${{ matrix.php_version }}-zip php${{ matrix.php_version }}-curl php${{ matrix.php_version }}-mbstring php${{ matrix.php_version }}-xml
+          # Set the specified PHP version as the default
+          docker exec target update-alternatives --set php /usr/bin/php${{ matrix.php_version }}
+        # Note: For PHP 8.0 on Ubuntu 20.04, this step will essentially ensure the default version is used and extensions are installed.
+
+      - name: Verify PHP version
+        run: docker exec target php -v
+        # This step helps confirm the PHP version in use.
+
       - name: Install test dependencies
         run: |
           docker exec -w /app/e107_tests/ -e COMPOSER_ALLOW_SUPERUSER=1 target \