PHP 8 compatibility

.github/workflows/lint.yml

@@ -1,5 +1,9 @@
 name: Linting
 
+env:
+  COMPOSER_VERSION: "2"
+  COMPOSER_CACHE: "${{ github.workspace }}/.composer-cache"
+
 on:
   push:
     branches:
@@ -28,21 +32,38 @@ jobs:
   phpcs:
     name: phpcs
     runs-on: ubuntu-latest
+
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v2.4.0
+
+    - name: Set standard 10up cache directories
+      run: |
+        composer config -g cache-dir "${{ env.COMPOSER_CACHE }}"
+
+    - name: Prepare composer cache
+      uses: actions/cache@v2
+      with:
+        path: ${{ env.COMPOSER_CACHE }}
+        key: composer-${{ env.COMPOSER_VERSION }}-${{ hashFiles('**/composer.lock') }}
+        restore-keys: |
+          composer-${{ env.COMPOSER_VERSION }}-
+
     - name: Set PHP version
       uses: shivammathur/setup-php@v2
       with:
         php-version: '7.4'
         coverage: none
-        tools: composer:v1
-    - name: composer install
+        tools: composer:v2
+
+    - name: Install dependencies
       run: composer install
+
     - name: PHPCS check
       uses: chekalsky/phpcs-action@v1
       with:
-        phpcs_bin_path: './vendor/bin/phpcs .'
+        phpcs_bin_path: './vendor/bin/phpcs . --runtime-set testVersion 7.0-'
+
   vipcs:
     name: vipcs
     runs-on: ubuntu-latest

.github/workflows/test.yml

@@ -1,5 +1,9 @@
 name: PHPUnit Tests
 
+env:
+  COMPOSER_VERSION: "2"
+  COMPOSER_CACHE: "${{ github.workspace }}/.composer-cache"
+
 on:
   schedule:
     - cron:  '0 0 * * *'
@@ -13,23 +17,41 @@ on:
 
 jobs:
   phpunit:
-    runs-on: ubuntu-latest
+    name: ${{ matrix.php }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        php: [ '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1' ]
+        os: [ ubuntu-latest ]
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v2.4.0
+
+    - name: Set standard 10up cache directories
+      run: |
+        composer config -g cache-dir "${{ env.COMPOSER_CACHE }}"
+
+    - name: Prepare composer cache
+      uses: actions/cache@v2
+      with:
+        path: ${{ env.COMPOSER_CACHE }}
+        key: composer-${{ env.COMPOSER_VERSION }}-${{ hashFiles('**/composer.lock') }}
+        restore-keys: |
+          composer-${{ env.COMPOSER_VERSION }}-
 
     - uses: getong/mariadb-action@v1.1
 
     - name: Set PHP version
-      uses: shivammathur/setup-php@v2
+      uses: shivammathur/setup-php@2.17.0
       with:
-        php-version: '7.4'
+        php-version: ${{ matrix.php }}
         coverage: none
-        tools: composer:v1
+        tools: phpunit-polyfills, composer:v2
 
     - name: Install dependencies
-      run: composer install
+      run: composer update -W
 
     - name: Setup WP Tests
       run: bash bin/install-wp-tests.sh wordpress_test root '' 127.0.0.1

.gitignore

@@ -1,6 +1,7 @@
 release
 /vendor/*
 phpunit.xml
+.phpunit.result.cache
 /dist
 coverage
 /docs

composer.json

@@ -10,7 +10,7 @@
   "type": "wordpress-plugin",
   "license": "GPLv2",
   "require": {
-    "php": ">=7.4",
+    "php": ">=7.0",
     "yahnis-elsts/plugin-update-checker": "4.6"
   },
   "autoload": {
@@ -22,10 +22,13 @@
     ]
   },
   "require-dev": {
-    "phpunit/phpunit": "^7.5",
     "10up/phpcs-composer": "dev-master",
     "yoast/phpunit-polyfills": "^1.0.0"
   },
+  "scripts": {
+    "lint": "phpcs . --runtime-set testVersion 7.0-",
+    "lint-fix": "phpcbf ."
+  },
   "minimum-stability": "dev",
   "config": {
     "allow-plugins": {