ci: run PHPT tests in Docker with debian/alpine matrix

Add Dockerfile.debian and Dockerfile.alpine for running PHPT tests
across PHP 8.2-8.5, both platforms, ts/nts, and opcache on/off.
PHPUnit and Windows jobs remain unchanged.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: rudi-augment

.github/workflows/main.yml

@@ -9,38 +9,35 @@ on:
 
 jobs:
   phpt:
-    name: PHPT - PHP ${{ matrix.php }} ${{ matrix.phpts }} OPcache=${{ matrix.opcache }}
+    name: PHPT - PHP ${{ matrix.php }} ${{ matrix.ts }} ${{ matrix.platform }} opcache=${{ matrix.opcache }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        php:
-          - "8.2"
-          - "8.3"
-          - "8.4"
-          - "8.5"
-        phpts: ["ts", "nts"]
-        opcache: [1, 0]
-
+        php: ['8.2', '8.3', '8.4', '8.5']
+        platform: [debian, alpine]
+        ts: [nts, ts]
+        opcache: [0, 1]
+        include:
+          - { platform: debian,  dockerfile: Dockerfile.debian }
+          - { platform: alpine,  dockerfile: Dockerfile.alpine }
+          - { ts: nts, variant: cli }
+          - { ts: ts,  variant: zts }
+          - { php: '8.5', tag: '8.5-rc' }
     steps:
       - uses: actions/checkout@v4
 
-      - name: Setup PHP
-        uses: shivammathur/setup-php@v2
-        with:
-          php-version: ${{ matrix.php }}
-          ini-values: opcache.enable_cli=${{ matrix.opcache }}
-        env:
-          phpts: ${{ matrix.phpts }}
-
-      - name: Build extension
-        run: |
-          phpize
-          ./configure --with-php-config=/usr/bin/php-config
-          make -j$(nproc)
-
-      - name: Run PHPT tests
-        run: make test TESTS=tests/ NO_INTERACTION=1
+      - name: Build
+        run: >
+          docker build
+          -f ${{ matrix.dockerfile }}
+          --build-arg PHP_VERSION=${{ matrix.tag || matrix.php }}
+          --build-arg PHP_VARIANT=${{ matrix.variant }}
+          --build-arg OPCACHE=${{ matrix.opcache }}
+          -t ext-ds .
+
+      - name: Test
+        run: docker run --rm ext-ds
 
   phpunit:
     name: PHPUnit - PHP ${{ matrix.php }}

Dockerfile.alpine

@@ -0,0 +1,27 @@
+ARG PHP_VERSION=8.4
+ARG PHP_VARIANT=cli
+FROM php:${PHP_VERSION}-${PHP_VARIANT}-alpine
+
+RUN apk add --no-cache \
+    gcc \
+    make \
+    autoconf \
+    libc-dev
+
+WORKDIR /ext-ds
+
+COPY . .
+
+RUN phpize --clean > /dev/null 2>&1 || true \
+    && phpize \
+    && ./configure \
+    && make -j$(nproc) \
+    && make install
+
+ARG OPCACHE=0
+ENV PHP_OPCACHE=${OPCACHE}
+
+CMD php -d opcache.enable_cli=${PHP_OPCACHE} run-tests.php \
+    -d extension=ds.so \
+    -n -q --show-diff \
+    tests/

Dockerfile.debian

@@ -0,0 +1,21 @@
+ARG PHP_VERSION=8.4
+ARG PHP_VARIANT=cli
+FROM php:${PHP_VERSION}-${PHP_VARIANT}
+
+WORKDIR /ext-ds
+
+COPY . .
+
+RUN phpize --clean > /dev/null 2>&1 || true \
+    && phpize \
+    && ./configure \
+    && make -j$(nproc) \
+    && make install
+
+ARG OPCACHE=0
+ENV PHP_OPCACHE=${OPCACHE}
+
+CMD php -d opcache.enable_cli=${PHP_OPCACHE} run-tests.php \
+    -d extension=ds.so \
+    -n -q --show-diff \
+    tests/