Allow installing and build on PHP 8

.github/workflows/ci.yaml

@@ -0,0 +1,59 @@
+# yamllint disable rule:line-length
+# yamllint disable rule:braces
+
+name: Continuous Integration
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+      - master
+
+jobs:
+  tests:
+    runs-on: ${{ matrix.operating-system }}
+
+    strategy:
+      matrix:
+        operating-system: [ubuntu-latest]
+        php-version: [7.2, 7.3, 7.4]
+        dependencies: ['']
+        include:
+          - { operating-system: 'ubuntu-latest', php-version: '8.0', dependencies: '--ignore-platform-req=php' }
+
+    name: CI on ${{ matrix.operating-system }} with PHP ${{ matrix.php-version }} ${{ matrix.dependencies }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          tools: composer:v2
+          extensions: pdo_sqlite
+
+      - name: Get composer cache directory
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: composer-${{ runner.os }}-${{ matrix.php-version }}-${{ hashFiles('composer.*') }}-${{ matrix.dependencies }}
+          restore-keys: |
+            composer-${{ runner.os }}-${{ matrix.php-version }}-${{ hashFiles('composer.*') }}-
+            composer-${{ runner.os }}-${{ matrix.php-version }}-
+            composer-${{ runner.os }}-
+            composer-
+
+      - name: Install dependencies
+        run: |
+          composer update --no-interaction --prefer-dist --no-progress ${{ matrix.dependencies }}
+
+      - name: Run tests
+        run: |
+          vendor/bin/phpunit

.travis.yml

@@ -29,6 +29,8 @@ matrix:
 
         - php: 7.4
           env: VERY_LATEST=1
+        - php: 8.0snapshot
+          env: COMPOSER_FLAGS='--ignore-platform-req=php'
     fast_finish: true
 
 install:

composer.json

@@ -16,7 +16,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2||^8.0",
         "doctrine/annotations": "^1.0",
         "doctrine/instantiator": "^1.0.3",
         "doctrine/lexer": "^1.1",

phpunit.xml.dist

@@ -13,6 +13,7 @@
     <php>
         <ini name="error_reporting" value="-1" />
         <ini name="serialize_precision" value="14"/>
+        <ini name="date.timezone" value="UTC"/>
     </php>
 
     <testsuites>

src/XmlDeserializationVisitor.php

@@ -77,7 +77,9 @@ public function prepare($data)
         $previous = libxml_use_internal_errors(true);
         libxml_clear_errors();
 
-        $previousEntityLoaderState = libxml_disable_entity_loader($this->disableExternalEntities);
+        if (\LIBXML_VERSION < 20900) {
+            $previousEntityLoaderState = libxml_disable_entity_loader($this->disableExternalEntities);
+        }
 
         if (false !== stripos($data, '<!doctype')) {
             $internalSubset = $this->getDomDocumentTypeEntitySubset($data);
@@ -92,7 +94,10 @@ public function prepare($data)
         $doc = simplexml_load_string($data, 'SimpleXMLElement', $this->options);
 
         libxml_use_internal_errors($previous);
-        libxml_disable_entity_loader($previousEntityLoaderState);
+
+        if (\LIBXML_VERSION < 20900) {
+            libxml_disable_entity_loader($previousEntityLoaderState);
+        }
 
         if (false === $doc) {
             throw new XmlErrorException(libxml_get_last_error());
@@ -202,7 +207,7 @@ public function visitArray($data, array $type): array
             $nodes = $data->xpath($entryName);
         }
 
-        if (!\count($nodes)) {
+        if (null === $nodes || !\count($nodes)) {
             return [];
         }