feat(ci/docs): add PHP 8.4 support to CI and docs

.github/markdown-link-check-config.json

@@ -0,0 +1,17 @@
+{
+  "ignorePatterns": [
+    {
+      "pattern": "^https://github.com/.*/pull/new/"
+    },
+    {
+      "pattern": "^http://localhost"
+    },
+    {
+      "pattern": "^https://sumguy.com"
+    }
+  ],
+  "timeout": "20s",
+  "retryOn429": true,
+  "retryCount": 3,
+  "aliveStatusCodes": [200, 206]
+}

.github/workflows/docker-ci.yml

@@ -4,9 +4,19 @@ on:
   push:
     branches:
       - '**'
+    paths-ignore:
+      - '**.md'
+      - 'docs/**'
+      - 'LICENSE'
+      - '.gitignore'
   pull_request:
     branches:
       - '**'
+    paths-ignore:
+      - '**.md'
+      - 'docs/**'
+      - 'LICENSE'
+      - '.gitignore'
   schedule:
     - cron: '0 3 * * 2'  # Weekly on Tuesday at 3:00 AM UTC
   workflow_dispatch:
@@ -22,7 +32,7 @@ jobs:
       fail-fast: false
       matrix:
         variant: [v1, v2]
-        php-version: ['8.3', '8.2']
+        php-version: ['8.4', '8.3', '8.2']
         php-type: [fpm, cli]
         php-base: [alpine, bookworm]
         exclude:
@@ -224,7 +234,7 @@ jobs:
       fail-fast: false
       matrix:
         variant: [v1, v2]
-        php-version: ['8.3', '8.2']
+        php-version: ['8.4', '8.3', '8.2']
         php-type: [fpm, cli, apache]
         php-base: [alpine, bookworm]
         exclude:

.github/workflows/docker-image.v1.yml

@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         php-type: [cli, fpm, apache]
-        php-version: ['8.3', '8.2']
+        php-version: ['8.4', '8.3', '8.2']
         php-base-os: [bookworm, alpine]
         exclude:
           - php-type: apache

.github/workflows/docs-ci.yml

@@ -0,0 +1,82 @@
+name: Documentation CI
+
+on:
+  push:
+    branches:
+      - '**'
+    paths:
+      - '**.md'
+      - 'docs/**'
+  pull_request:
+    branches:
+      - '**'
+    paths:
+      - '**.md'
+      - 'docs/**'
+  workflow_dispatch:
+
+concurrency:
+  group: docs-ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  markdown-lint:
+    runs-on: ubuntu-latest
+    name: Markdown Lint
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Lint Markdown files
+        uses: DavidAnson/markdownlint-cli2-action@v16
+        with:
+          globs: |
+            **/*.md
+            !node_modules
+            !.github
+
+      - name: Summary
+        run: |
+          echo "✅ Markdown linting passed"
+
+  link-checker:
+    runs-on: ubuntu-latest
+    name: Check Links
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Check links in markdown files
+        uses: gaurav-nelson/github-action-markdown-link-check@v1
+        with:
+          use-quiet-mode: 'yes'
+          config-file: '.github/markdown-link-check-config.json'
+          check-modified-files-only: 'yes'
+          base-branch: 'main'
+
+      - name: Summary
+        if: success()
+        run: |
+          echo "✅ Link checking passed"
+
+  docs-summary:
+    runs-on: ubuntu-latest
+    name: Docs CI Summary
+    needs: [markdown-lint, link-checker]
+    if: always()
+
+    steps:
+      - name: Check job results
+        run: |
+          if [ "${{ needs.markdown-lint.result }}" = "success" ] && [ "${{ needs.link-checker.result }}" = "success" ]; then
+            echo "✅ All documentation checks passed"
+            exit 0
+          elif [ "${{ needs.link-checker.result }}" = "failure" ]; then
+            echo "⚠️ Link checker failed (non-blocking)"
+            exit 0
+          else
+            echo "❌ Documentation checks failed"
+            exit 1
+          fi

.markdownlint.json

@@ -0,0 +1,10 @@
+{
+  "default": true,
+  "MD013": false,
+  "MD033": false,
+  "MD041": false,
+  "MD022": false,
+  "MD032": false,
+  "MD040": false,
+  "MD031": false
+}

README.md

@@ -17,7 +17,7 @@ See [v1 vs v2 comparison](#v1-vs-v2-comparison) below for details.
 ## Features
 
 - **Multi-Architecture Support**: Works on `amd64`, `arm64/aarch64` and `arm32v7/armhf` platforms
-- **Multiple PHP Versions**: PHP 8.2 and 8.3 (actively built); PHP 7, 8 and 8.1 deprecated
+- **Multiple PHP Versions**: PHP 8.2, 8.3, and 8.4 (actively built); PHP 7.x, 8.0, and 8.1 deprecated
 - **Multiple Server Types**: CLI, FPM, and Apache
 - **Base OS Options**: Alpine (lightweight) and Debian (Bookworm/Bullseye)
 - **Extensive Extensions**: 30+ PHP extensions pre-installed
@@ -65,7 +65,7 @@ The following environment variables can be overridden when running containers:
 | `PHP_OPCACHE_MAX_ACCELERATED_FILES` | `10000` | OPCache maximum number of files |
 | `PHP_OPCACHE_REVALIDATE_FREQ` | `0` | How often to check script timestamps |
 
-### Example usage:
+### Example usage
 
 ```bash
 docker run -e PHP_MEMORY_LIMIT=512M -e PHP_MAX_EXECUTION_TIME=600 kingpin/php-docker:8.3-fpm-alpine
@@ -311,6 +311,11 @@ Both v1 and v2 variants are available for all combinations below:
 
 | PHP Version | Type   | OS        | v1 Tag Example         | v2 Tag Example             |
 |-------------|--------|-----------|------------------------|----------------------------|
+| 8.4         | CLI    | Alpine    | `8.4-cli-alpine`       | `8.4-cli-alpine-v2`        |
+| 8.4         | CLI    | Bookworm  | `8.4-cli-bookworm`     | `8.4-cli-bookworm-v2`      |
+| 8.4         | FPM    | Alpine    | `8.4-fpm-alpine`       | `8.4-fpm-alpine-v2`        |
+| 8.4         | FPM    | Bookworm  | `8.4-fpm-bookworm`     | `8.4-fpm-bookworm-v2`      |
+| 8.4         | Apache | Bookworm  | `8.4-apache-bookworm`  | `8.4-apache-bookworm-v2`   |
 | 8.3         | CLI    | Alpine    | `8.3-cli-alpine`       | `8.3-cli-alpine-v2`        |
 | 8.3         | CLI    | Bookworm  | `8.3-cli-bookworm`     | `8.3-cli-bookworm-v2`      |
 | 8.3         | FPM    | Alpine    | `8.3-fpm-alpine`       | `8.3-fpm-alpine-v2`        |
@@ -322,7 +327,6 @@ Both v1 and v2 variants are available for all combinations below:
 | 8.2         | FPM    | Bookworm  | `8.2-fpm-bookworm`     | `8.2-fpm-bookworm-v2`      |
 | 8.2         | Apache | Bookworm  | `8.2-apache-bookworm`  | `8.2-apache-bookworm-v2`   |
 
-
 > **Note:** PHP 8.1+ images are built on Bookworm (Debian 12). Bullseye tags redirect to Bookworm for PHP 8.1+.
 
 ### Deprecated Tags (v1 only)
@@ -344,7 +348,7 @@ The following tags are deprecated and will not be built going forward, but remai
   - `8.1-fpm-bullseye`, `8.1-fpm-bookworm`, `8.1-fpm-alpine`
   - `8.1-apache-bullseye`, `8.1-apache-bookworm`
 
-> **Important:** These versions are deprecated. Please upgrade to PHP 8.2 or 8.3 for security and performance.
+> **Important:** These versions are deprecated. Please upgrade to PHP 8.2, 8.3, or 8.4 for security and performance.
 
 ## 📊 Image Sizes
 

docs/ci.md

@@ -97,7 +97,7 @@ These run only via `workflow_dispatch` (manual trigger) and don't publish automa
 **Recommended settings for `main` branch:**
 
 1. **Require pull request reviews**: At least 1 approval
-2. **Require status checks**: 
+2. **Require status checks**:
    - `build-and-test` must pass
    - All matrix jobs must succeed
 3. **Require branches to be up to date**: Enable

docs/deprecated-images.md

@@ -41,7 +41,7 @@ This document lists PHP versions that are **no longer actively built** but remai
 **Last Build**: January 2025  
 **Reason**: Focus maintenance on PHP 8.2+ for better resource allocation
 
-#### Available Tags (Legacy)
+#### Available Tags
 
 **Alpine-based:**
 - `8.1-cli-alpine`

docs/troubleshooting.md

@@ -116,20 +116,20 @@ docker run -e PHP_OPCACHE_MEMORY_CONSUMPTION=256 \
   kingpin/php-docker:8.3-fpm-alpine-v2
 ```
 
-2. **Enable JIT (PHP 8.0+):**
+1. **Enable JIT (PHP 8.0+):**
 ```ini
 # Create custom php.ini
 opcache.jit_buffer_size=100M
 opcache.jit=1255
 ```
 
-3. **Use Alpine for smaller footprint:**
+1. **Use Alpine for smaller footprint:**
 ```bash
 # Alpine is lighter than Bookworm
 docker pull kingpin/php-docker:8.3-fpm-alpine-v2
 ```
 
-4. **Profile your code:**
+1. **Profile your code:**
 ```bash
 # Install xdebug for profiling
 FROM kingpin/php-docker:8.3-fpm-alpine-v2
@@ -255,7 +255,7 @@ COPY s6-services/ /etc/services.d/
 docker run --rm kingpin/php-docker:8.3-cli-alpine ping -c 3 db-host
 ```
 
-2. **Verify database host:**
+1. **Verify database host:**
 ```yaml
 # Use service name in docker-compose
 services:
@@ -266,7 +266,7 @@ services:
     image: mysql:8
 ```
 
-3. **Check database is ready:**
+1. **Check database is ready:**
 ```yaml
 services:
   php: