Strip script and style tags through ::clean() method instead of preg_replace

Huge tags can lead to a failure of preg_replace, thus erasing the whole
fetched content.

Fixes https://github.com/wallabag/wallabag/issues/5847

Signed-off-by: Kevin Decherf <kevin@kdecherf.com>

.editorconfig

@@ -8,3 +8,6 @@ indent_style = space
 indent_size = 4
 trim_trailing_whitespace = true
 insert_final_newline = true
+
+[.github/**.yml]
+indent_size = 2

.gitattributes

@@ -6,4 +6,6 @@
 /.php_cs export-ignore
 /phpunit.xml.dist export-ignore
 /phpstan.neon export-ignore
+/rector.php export-ignore
+/.github export-ignore
 /tests export-ignore

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: j0k3r

.github/workflows/coding-standards.yml

@@ -0,0 +1,47 @@
+name: "CS"
+
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+jobs:
+  coding-standards:
+    name: "CS Fixer & PHPStan"
+    runs-on: "ubuntu-20.04"
+
+    strategy:
+      matrix:
+        php:
+          - "7.4"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: "${{ matrix.php }}"
+          tools: cs2pr, composer:v2
+          ini-values: "date.timezone=Europe/Paris"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: "Install dependencies with Composer"
+        uses: "ramsey/composer-install@v1"
+        with:
+          composer-options: "--optimize-autoloader --prefer-dist"
+
+      - name: "Run PHP CS Fixer"
+        run: "php vendor/bin/php-cs-fixer fix --verbose --dry-run --format=checkstyle | cs2pr"
+
+      - name: "Install PHPUnit for PHPStan"
+        run: "php vendor/bin/simple-phpunit install"
+
+      - name: "Run PHPStan"
+        run: "php vendor/bin/phpstan analyse --error-format=checkstyle | cs2pr"

.github/workflows/continuous-integration.yml

@@ -0,0 +1,149 @@
+name: "CI"
+
+on:
+  pull_request:
+    branches:
+      - "master"
+  push:
+    branches:
+      - "master"
+
+env:
+  fail-fast: true
+
+jobs:
+  phpunit:
+    name: "PHPUnit (PHP ${{ matrix.php }})"
+    runs-on: "ubuntu-20.04"
+
+    strategy:
+      matrix:
+        php:
+          - "7.2"
+          - "7.3"
+          - "7.4"
+          - "8.0"
+          - "8.1"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+        with:
+          fetch-depth: 2
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          php-version: "${{ matrix.php }}"
+          coverage: "none"
+          tools: composer:v2
+          extensions: tidy
+          ini-values: "date.timezone=Europe/Paris"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: "Remove useless deps"
+        run: "composer remove friendsofphp/php-cs-fixer --dev --no-progress --no-update"
+
+      - name: "Install dependencies with Composer"
+        uses: "ramsey/composer-install@v1"
+        with:
+          composer-options: "--optimize-autoloader --prefer-dist"
+
+      - name: "Setup logs"
+        run: "mkdir -p build/logs"
+
+      - name: "Run PHPUnit"
+        run: "php vendor/bin/simple-phpunit -v"
+
+  phpunit-coverage:
+    name: "PHPUnit coverage (PHP ${{ matrix.php }})"
+    runs-on: "ubuntu-20.04"
+
+    strategy:
+      matrix:
+        php:
+          - "7.4"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+        with:
+          fetch-depth: 2
+
+      - name: "Install PHP with Xdebug"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          php-version: "${{ matrix.php }}"
+          coverage: "xdebug"
+          tools: composer:v2
+          extensions: tidy
+          ini-values: "date.timezone=Europe/Paris"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: "Remove useless deps"
+        run: "composer remove friendsofphp/php-cs-fixer --dev --no-progress --no-update"
+
+      - name: "Install dependencies with Composer"
+        uses: "ramsey/composer-install@v1"
+        with:
+          composer-options: "--optimize-autoloader --prefer-dist"
+
+      - name: "Setup logs"
+        run: "mkdir -p build/logs"
+
+      - name: "Run PHPUnit (with coverage)"
+        run: "php vendor/bin/simple-phpunit -v --coverage-clover build/logs/clover.xml"
+
+      - name: "Retrieve Coveralls phar"
+        run: "wget https://github.com/php-coveralls/php-coveralls/releases/download/v2.4.2/php-coveralls.phar"
+
+      - name: "Enable Coveralls phar"
+        run: "chmod +x php-coveralls.phar"
+
+      - name: "Upload to Coveralls"
+        run: "php php-coveralls.phar -v -x build/logs/clover.xml"
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  phpunit-lowest:
+    name: "PHPUnit lowest deps (PHP ${{ matrix.php }})"
+    runs-on: "ubuntu-20.04"
+
+    strategy:
+      matrix:
+        php:
+          - "7.2"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+        with:
+          fetch-depth: 2
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          php-version: "${{ matrix.php }}"
+          coverage: "none"
+          tools: composer:v2
+          extensions: tidy
+          ini-values: "date.timezone=Europe/Paris"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: "Remove useless deps"
+        run: "composer remove friendsofphp/php-cs-fixer --dev --no-progress --no-update"
+
+      - name: "Install dependencies with Composer"
+        uses: "ramsey/composer-install@v1"
+        with:
+          composer-options: "--optimize-autoloader --prefer-dist"
+          dependency-versions: "lowest"
+
+      - name: "Setup logs"
+        run: "mkdir -p build/logs"
+
+      - name: "Run PHPUnit"
+        run: "php vendor/bin/simple-phpunit -v"

.gitignore

@@ -2,4 +2,5 @@ vendor/
 coverage/
 composer.lock
 .php_cs.cache
+.php-cs-fixer.cache
 .phpunit.result.cache

.php-cs-fixer.php

@@ -1,6 +1,11 @@
 <?php
 
-return PhpCsFixer\Config::create()
+$finder = (new PhpCsFixer\Finder())
+    ->in(__DIR__)
+    ->exclude(['vendor', 'var', 'web'])
+;
+
+return (new PhpCsFixer\Config())
     ->setUsingCache(true)
     ->setRiskyAllowed(true)
     ->setRules([
@@ -9,7 +14,7 @@ return PhpCsFixer\Config::create()
         'array_syntax' => ['syntax' => 'short'],
         'combine_consecutive_unsets' => true,
         'heredoc_to_nowdoc' => true,
-        'no_extra_consecutive_blank_lines' => ['break', 'continue', 'extra', 'return', 'throw', 'use', 'parenthesis_brace_block', 'square_brace_block', 'curly_brace_block'],
+        'no_extra_blank_lines' => ['tokens' => ['break', 'continue', 'extra', 'return', 'throw', 'use', 'parenthesis_brace_block', 'square_brace_block', 'curly_brace_block']],
         'no_unreachable_default_argument_value' => true,
         'no_useless_else' => true,
         'no_useless_return' => true,
@@ -22,9 +27,5 @@ return PhpCsFixer\Config::create()
         'strict_param' => true,
         'concat_space' => ['spacing' => 'one'],
     ])
-    ->setFinder(
+    ->setFinder($finder)
-        PhpCsFixer\Finder::create()
-            ->exclude(['vendor'])
-            ->in(__DIR__)
-    )
 ;

.scrutinizer.yml

@@ -1,12 +0,0 @@
-tools:
-    external_code_coverage: false
-
-build:
-    nodes:
-        analysis:
-            tests:
-                override:
-                    - php-scrutinizer-run
-            environment:
-                php:
-                    version: 7.2

.travis.yml

@@ -1,54 +0,0 @@
-dist: xenial
-os: linux
-language: php
-
-php:
-    - 5.6
-    - 7.0
-    - 7.1
-
-jobs:
-    include:
-        - php: 7.2
-          env: SYMFONY_PHPUNIT_VERSION=7.5
-        - php: 7.2
-          env: SYMFONY_PHPUNIT_VERSION=7.5 COMPOSER_FLAGS="--prefer-lowest"
-        - php: 7.3
-          env: SYMFONY_PHPUNIT_VERSION=7.5 CS_FIXER=run COVERAGE=run
-        - php: 7.4
-          env: SYMFONY_PHPUNIT_VERSION=7.5
-        - php: nightly
-          env: SYMFONY_PHPUNIT_VERSION=7.5
-    fast_finish: true
-    allow_failures:
-        - php: nightly
-
-cache:
-    directories:
-        - $HOME/.composer/cache/files
-
-before_install:
-    - if [ -n "$GH_TOKEN" ]; then composer config github-oauth.github.com ${GH_TOKEN}; fi;
-
-install:
-    # only install phpstan when we need it
-    - if [ "$CS_FIXER" = "run" ]; then composer require phpstan/phpstan phpstan/phpstan-phpunit --dev --no-progress --no-suggest ; fi;
-    - composer update --prefer-dist --no-progress --no-suggest -o $COMPOSER_FLAGS
-    - php vendor/bin/simple-phpunit install
-
-before_script:
-    - mkdir -p build/logs
-    - if [ "$COVERAGE" = "run" ]; then PHPUNIT_FLAGS="--coverage-clover build/logs/clover.xml"; fi;
-
-script:
-    - php vendor/bin/simple-phpunit -v $PHPUNIT_FLAGS
-    - if [ "$CS_FIXER" = "run" ]; then php vendor/bin/php-cs-fixer fix --verbose --dry-run ; fi;
-    - if [ "$CS_FIXER" = "run" ]; then php vendor/bin/phpstan analyse src tests --no-progress --level 1 ; fi;
-
-after_success:
-    - |
-        if [ "$COVERAGE" = "run" ]; then
-            wget https://github.com/php-coveralls/php-coveralls/releases/download/v2.2.0/php-coveralls.phar
-            chmod +x php-coveralls.phar
-            php php-coveralls.phar -v -x build/logs/clover.xml
-        fi

README.md

@@ -1,11 +1,11 @@
 # Readability
 
-[![Build Status](https://travis-ci.org/j0k3r/php-readability.svg?branch=master)](https://travis-ci.org/j0k3r/php-readability)
+![CI](https://github.com/j0k3r/php-readability/workflows/CI/badge.svg)
 [![Coverage Status](https://coveralls.io/repos/j0k3r/php-readability/badge.svg?branch=master&service=github)](https://coveralls.io/github/j0k3r/php-readability/?branch=master)
 [![Total Downloads](https://poser.pugx.org/j0k3r/php-readability/downloads)](https://packagist.org/packages/j0k3r/php-readability)
 [![License](https://poser.pugx.org/j0k3r/php-readability/license)](https://packagist.org/packages/j0k3r/php-readability)
 
-This is an extract of the Readability class from this [full-text-rss](https://github.com/Dither/full-text-rss) fork. It can be defined as a better version of the original [php-readability](https://bitbucket.org/fivefilters/php-readability/overview).
+This is an extract of the Readability class from this [full-text-rss](https://github.com/Dither/full-text-rss) fork. It can be defined as a better version of the original [php-readability](https://bitbucket.org/fivefilters/php-readability).
 
 ## Differences
 

composer.json

@@ -24,15 +24,18 @@
         "role": "Developer (original JS version)"
     }],
     "require": {
-        "php": ">=5.6.0",
+        "php": ">=7.2.0",
         "ext-mbstring": "*",
         "psr/log": "^1.0",
         "masterminds/html5": "^2.7"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "^2.14",
+        "friendsofphp/php-cs-fixer": "^3.0",
         "monolog/monolog": "^1.24|^2.1",
-        "symfony/phpunit-bridge": "^4.2.3"
+        "symfony/phpunit-bridge": "^4.4|^5.3|^6.0",
+        "phpstan/phpstan": "^1.3",
+        "phpstan/phpstan-phpunit": "^1.0",
+        "rector/rector": "^0.12.15"
     },
     "suggest": {
         "ext-tidy": "Used to clean up given HTML and to avoid problems with bad HTML structure."
@@ -42,5 +45,10 @@
     },
     "autoload-dev": {
         "psr-4": { "Tests\\Readability\\": "tests/" }
+    },
+    "config":{
+        "platform": {
+            "php": "7.2.34"
+        }
     }
 }

phpstan.neon

@@ -1,8 +1,15 @@
+parameters:
+    level: 1
+    paths:
+        - src
+        - tests
+
+    # https://github.com/phpstan/phpstan/issues/694#issuecomment-350724288
+    bootstrapFiles:
+        - vendor/bin/.phpunit/phpunit-8.5-0/vendor/autoload.php
+
+    checkMissingIterableValueType: false
+
 includes:
     - vendor/phpstan/phpstan-phpunit/extension.neon
     - vendor/phpstan/phpstan-phpunit/rules.neon
-
-parameters:
-    # https://github.com/phpstan/phpstan/issues/694#issuecomment-350724288
-    autoload_files:
-        - vendor/bin/.phpunit/phpunit-7.5-0/vendor/autoload.php

phpunit.xml.dist

@@ -11,7 +11,7 @@
     >
 
     <testsuites>
-        <testsuite name="Readability Test Suite">
+        <testsuite name="Readability">
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>

rector.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Core\Configuration\Option;
+use Rector\Core\ValueObject\PhpVersion;
+use Rector\Set\ValueObject\LevelSetList;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $parameters = $containerConfigurator->parameters();
+
+    // paths to refactor; solid alternative to CLI arguments
+    $parameters->set(Option::PATHS, [
+        __DIR__ . '/src',
+        __DIR__ . '/tests',
+    ]);
+
+    // Path to phpstan with extensions, that PHPSTan in Rector uses to determine types
+    $parameters->set(Option::PHPSTAN_FOR_RECTOR_PATH, __DIR__ . '/phpstan.neon');
+
+    $parameters->set(Option::BOOTSTRAP_FILES, [
+        __DIR__ . '/vendor/bin/.phpunit/phpunit-8.5-0/vendor/autoload.php',
+        __DIR__ . '/vendor/autoload.php',
+    ]);
+
+    // Define what rule sets will be applied
+    $containerConfigurator->import(LevelSetList::UP_TO_PHP_72);
+
+    // is your PHP version different from the one your refactor to?
+    $parameters->set(Option::PHP_VERSION_FEATURES, PhpVersion::PHP_72);
+};

src/JSLikeHTMLElement.php

@@ -47,14 +47,16 @@ class JSLikeHTMLElement extends \DOMElement
     {
         if ('innerHTML' !== $name) {
             $trace = debug_backtrace();
-            trigger_error('Undefined property via __set(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'], E_USER_NOTICE);
+            trigger_error('Undefined property via __set(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'], \E_USER_NOTICE);
 
             return;
         }
 
         // first, empty the element
-        for ($x = $this->childNodes->length - 1; $x >= 0; --$x) {
+        if (isset($this->childNodes)) {
-            $this->removeChild($this->childNodes->item($x));
+            for ($x = $this->childNodes->length - 1; $x >= 0; --$x) {
+                $this->removeChild($this->childNodes->item($x));
+            }
         }
 
         // $value holds our new inner HTML
@@ -112,15 +114,17 @@ class JSLikeHTMLElement extends \DOMElement
         if ('innerHTML' === $name) {
             $inner = '';
 
-            foreach ($this->childNodes as $child) {
+            if (isset($this->childNodes)) {
-                $inner .= $this->ownerDocument->saveXML($child);
+                foreach ($this->childNodes as $child) {
+                    $inner .= $this->ownerDocument->saveXML($child);
+                }
             }
 
             return $inner;
         }
 
         $trace = debug_backtrace();
-        trigger_error('Undefined property via __get(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'], E_USER_NOTICE);
+        trigger_error('Undefined property via __get(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'], \E_USER_NOTICE);
     }
 
     public function __toString()

tests/ReadabilityTest.php

@@ -4,120 +4,129 @@ namespace Tests\Readability;
 
 use Monolog\Handler\TestHandler;
 use Monolog\Logger;
+use Psr\Log\LoggerInterface;
+use Readability\JSLikeHTMLElement;
 use Readability\Readability;
 
 class ReadabilityTest extends \PHPUnit\Framework\TestCase
 {
+    /** @var TestHandler */
     public $logHandler;
+    /** @var LoggerInterface */
     public $logger;
 
     /**
      * @requires extension tidy
      */
-    public function testConstructDefault()
+    public function testConstructDefault(): void
     {
         $readability = $this->getReadability('');
+        $readability->init();
 
         $this->assertNull($readability->url);
         $this->assertInstanceOf('DomDocument', $readability->dom);
     }
 
-    public function testConstructHtml5Parser()
+    public function testConstructHtml5Parser(): void
     {
         $readability = $this->getReadability('<html/>', 'http://0.0.0.0', 'html5lib');
+        $readability->init();
 
-        $this->assertEquals('http://0.0.0.0', $readability->url);
+        $this->assertSame('http://0.0.0.0', $readability->url);
         $this->assertInstanceOf('DomDocument', $readability->dom);
-        $this->assertEquals('<html/>', $readability->original_html);
+        $this->assertSame('<html/>', $readability->original_html);
     }
 
     /**
      * @requires extension tidy
      */
-    public function testConstructSimple()
+    public function testConstructSimple(): void
     {
         $readability = $this->getReadability('<html/>', 'http://0.0.0.0');
+        $readability->init();
 
-        $this->assertEquals('http://0.0.0.0', $readability->url);
+        $this->assertSame('http://0.0.0.0', $readability->url);
         $this->assertInstanceOf('DomDocument', $readability->dom);
-        $this->assertEquals('<html/>', $readability->original_html);
+        $this->assertSame('<html/>', $readability->original_html);
         $this->assertTrue($readability->tidied);
     }
 
-    public function testConstructDefaultWithoutTidy()
+    public function testConstructDefaultWithoutTidy(): void
     {
         $readability = $this->getReadability('', null, 'libxml', false);
+        $readability->init();
 
         $this->assertNull($readability->url);
-        $this->assertEquals('', $readability->original_html);
+        $this->assertSame('', $readability->original_html);
         $this->assertFalse($readability->tidied);
 
         $this->assertInstanceOf('DomDocument', $readability->dom);
     }
 
-    public function testConstructSimpleWithoutTidy()
+    public function testConstructSimpleWithoutTidy(): void
     {
         $readability = $this->getReadability('<html/>', 'http://0.0.0.0', 'libxml', false);
+        $readability->init();
 
-        $this->assertEquals('http://0.0.0.0', $readability->url);
+        $this->assertSame('http://0.0.0.0', $readability->url);
         $this->assertInstanceOf('DomDocument', $readability->dom);
-        $this->assertEquals('<html/>', $readability->original_html);
+        $this->assertSame('<html/>', $readability->original_html);
         $this->assertFalse($readability->tidied);
     }
 
-    public function testInitNoContent()
+    public function testInitNoContent(): void
     {
         $readability = $this->getReadability('<html/>', 'http://0.0.0.0');
         $res = $readability->init();
 
         $this->assertFalse($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('Sorry, Readability was unable to parse this page for content.', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('Sorry, Readability was unable to parse this page for content.', $readability->getContent()->getInnerHtml());
     }
 
-    public function testInitP()
+    public function testInitP(): void
     {
         $readability = $this->getReadability(str_repeat('<p>This is the awesome content :)</p>', 7), 'http://0.0.0.0');
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertContains('<div readability=', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<div readability=', $readability->getContent()->getInnerHtml());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is the awesome content :)', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is the awesome content :)', $readability->getContent()->getInnerHtml());
     }
 
-    public function testInitDivP()
+    public function testInitDivP(): void
     {
         $readability = $this->getReadability('<div>' . str_repeat('<p>This is the awesome content :)</p>', 7) . '</div>', 'http://0.0.0.0');
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertContains('<div readability=', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<div readability=', $readability->getContent()->getInnerHtml());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is the awesome content :)', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is the awesome content :)', $readability->getContent()->getInnerHtml());
     }
 
-    public function testInitDiv()
+    public function testInitDiv(): void
     {
         $readability = $this->getReadability('<div>' . str_repeat('This is the awesome content :)', 7) . '</div>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertContains('<div readability=', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<div readability=', $readability->getContent()->getInnerHtml());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is the awesome content :)', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is the awesome content :)', $readability->getContent()->getInnerHtml());
     }
 
-    public function testWithFootnotes()
+    public function testWithFootnotes(): void
     {
         $readability = $this->getReadability('<div>' . str_repeat('<p>This is an awesome text with some links, here there are: <a href="http://0.0.0.0/test.html">the awesome</a></p>', 7) . '</div>', 'http://0.0.0.0');
         $readability->debug = true;
@@ -125,16 +134,16 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertContains('<div readability=', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<div readability=', $readability->getContent()->getInnerHtml());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertContains('readabilityFootnoteLink', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('readabilityFootnoteLink', $readability->getContent()->getInnerHtml());
-        $this->assertContains('readabilityLink-3', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('readabilityLink-3', $readability->getContent()->getInnerHtml());
     }
 
-    public function testStandardClean()
+    public function testStandardClean(): void
     {
         $readability = $this->getReadability('<div><h2>Title</h2>' . str_repeat('<p>This is an awesome text with some links, here there are: <a href="http://0.0.0.0/test.html">the awesome</a></p>', 7) . '<a href="#nofollow" rel="nofollow">will NOT be removed</a></div>', 'http://0.0.0.0');
         $readability->debug = true;
@@ -142,76 +151,76 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertContains('<div readability=', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<div readability=', $readability->getContent()->getInnerHtml());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertContains('will NOT be removed', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('will NOT be removed', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('<h2>', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('<h2>', $readability->getContent()->getInnerHtml());
     }
 
-    public function testWithIframe()
+    public function testWithIframe(): void
     {
         $readability = $this->getReadability('<div><h2>Title</h2>' . str_repeat('<p>This is an awesome text with some links, here there are: <a href="http://0.0.0.0/test.html">the awesome</a></p>', 7) . '<p>This is an awesome text with some links, here there are <iframe src="http://youtube.com/test" href="#nofollow" rel="nofollow"></iframe><iframe>http://soundcloud.com/test</iframe></p></div>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertContains('<div readability=', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<div readability=', $readability->getContent()->getInnerHtml());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertContains('nofollow', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('nofollow', $readability->getContent()->getInnerHtml());
     }
 
-    public function testWithArticle()
+    public function testWithArticle(): void
     {
         $readability = $this->getReadability('<article><p>' . str_repeat('This is an awesome text with some links, here there are: the awesome', 20) . '</p><p>This is an awesome text with some links, here there are <iframe src="http://youtube.com/test" href="#nofollow" rel="nofollow"></iframe></p></article>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertContains('alt="article"', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('alt="article"', $readability->getContent()->getInnerHtml());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertContains('nofollow', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('nofollow', $readability->getContent()->getInnerHtml());
     }
 
-    public function testWithAside()
+    public function testWithAside(): void
     {
         $readability = $this->getReadability('<article>' . str_repeat('<p>This is an awesome text with some links, here there are: <a href="http://0.0.0.0/test.html">the awesome</a></p>', 7) . '<footer><aside>' . str_repeat('<p>This is an awesome text with some links, here there are</p>', 8) . '</aside></footer></article>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('<aside>', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('<aside>', $readability->getContent()->getInnerHtml());
-        $this->assertContains('<footer readability="5"/>', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<footer readability="9"/>', $readability->getContent()->getInnerHtml());
     }
 
-    public function testWithClasses()
+    public function testWithClasses(): void
     {
         $readability = $this->getReadability('<article>' . str_repeat('<p>This is an awesome text with some links, here there are: <a href="http://0.0.0.0/test.html">the awesome</a></p>', 7) . '<div style="display:none">' . str_repeat('<p class="clock">This text should be removed</p>', 10) . '</div></article>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertContains('alt="article"', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('alt="article"', $readability->getContent()->getInnerHtml());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('This text should be removed', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text should be removed', $readability->getContent()->getInnerHtml());
     }
 
-    public function testWithClassesWithoutLightClean()
+    public function testWithClassesWithoutLightClean(): void
     {
         $readability = $this->getReadability('<article>' . str_repeat('<p>This is an awesome text with some links, here there are: <a href="http://0.0.0.0/test.html">the awesome</a></p>', 7) . '<div style="display:none">' . str_repeat('<p class="clock">This text should be removed</p>', 10) . '</div></article>', 'http://0.0.0.0');
         $readability->debug = true;
@@ -219,122 +228,119 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertContains('alt="article"', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('alt="article"', $readability->getContent()->getInnerHtml());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('This text should be removed', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text should be removed', $readability->getContent()->getInnerHtml());
     }
 
-    public function testWithTd()
+    public function testWithTd(): void
     {
         $readability = $this->getReadability('<table><tr>' . str_repeat('<td><p>This is an awesome text with some links, here there are the awesome</td>', 7) . '</tr></table>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
     }
 
-    public function testWithSameClasses()
+    public function testWithSameClasses(): void
     {
         $readability = $this->getReadability('<article class="awesomecontent">' . str_repeat('<p>This is an awesome text with some links, here there are the awesome</p>', 7) . '<div class="awesomecontent">This text is also an awesome text and you should know that !</div></article>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertContains('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
-    public function testWithScript()
+    public function testWithScript(): void
     {
         $readability = $this->getReadability('<article class="awesomecontent">' . str_repeat('<p>This is an awesome text with some links, here there are the awesome</p>', 7) . '<p><script>This text is also an awesome text and you should know that !</script></p></article>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
-    public function testTitle()
+    public function testTitle(): void
     {
         $readability = $this->getReadability('<title>this is my title</title><article class="awesomecontent">' . str_repeat('<p>This is an awesome text with some links, here there are the awesome</p>', 7) . '<p></p></article>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertEquals('this is my title', $readability->getTitle()->getInnerHtml());
+        $this->assertSame('this is my title', $readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
-    public function testTitleWithDash()
+    public function testTitleWithDash(): void
     {
         $readability = $this->getReadability('<title> title2 - title3 </title><article class="awesomecontent">' . str_repeat('<p>This is an awesome text with some links, here there are the awesome</p>', 7) . '<p></p></article>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertEquals('title2 - title3', $readability->getTitle()->getInnerHtml());
+        $this->assertSame('title2 - title3', $readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
-    public function testTitleWithDoubleDot()
+    public function testTitleWithDoubleDot(): void
     {
         $readability = $this->getReadability('<title> title2 : title3 </title><article class="awesomecontent">' . str_repeat('<p>This is an awesome text with some links, here there are the awesome</p>', 7) . '<p></p></article>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertEquals('title2 : title3', $readability->getTitle()->getInnerHtml());
+        $this->assertSame('title2 : title3', $readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
-    public function testTitleTooShortUseH1()
+    public function testTitleTooShortUseH1(): void
     {
         $readability = $this->getReadability('<title>too short</title><h1>this is my h1 title !</h1><article class="awesomecontent">' . str_repeat('<p>This is an awesome text with some links, here there are the awesome</p>', 7) . '<p></p></article>', 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertEquals('this is my h1 title !', $readability->getTitle()->getInnerHtml());
+        $this->assertSame('this is my h1 title !', $readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
-    // dummy function to be used to the next test
+    public function testAutoClosingIframeNotThrowingException(): void
-    public function error2Exception($code, $string, $file, $line, $context)
     {
-        throw new \Exception($string, $code);
+        error_reporting(\E_ALL | \E_STRICT);
-    }
+        ini_set('display_errors', '1');
-
+        // dummy function to be used to the next test
-    public function testAutoClosingIframeNotThrowingException()
+        set_error_handler(function (int $errno, string $errstr, string $errfile, int $errline, array $errcontext) {
-    {
+            throw new \Exception($errstr, $errno);
-        error_reporting(E_ALL | E_STRICT);
+        }, \E_ALL | \E_STRICT);
-        ini_set('display_errors', true);
-        set_error_handler([$this, 'error2Exception'], E_ALL | E_STRICT);
 
         $data = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
             <html xmlns="http://www.w3.org/1999/xhtml" lang="ru-RU" prefix="og: http://ogp.me/ns#">
@@ -367,16 +373,16 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
-        $this->assertContains('<iframe src="https://www.youtube.com/embed/PUep6xNeKjA" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"> </iframe>', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<iframe src="https://www.youtube.com/embed/PUep6xNeKjA" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"> </iframe>', $readability->getContent()->getInnerHtml());
-        $this->assertContains('3D Touch', $readability->getTitle()->getInnerHtml());
+        $this->assertStringContainsString('3D Touch', $readability->getTitle()->getInnerHtml());
     }
 
     /**
      * This should generate an Exception "DOMElement::setAttribute(): ID post-60 already defined".
      */
-    public function testAppendIdAlreadyHere()
+    public function testAppendIdAlreadyHere(): void
     {
         $data = '<!DOCTYPE html>
             <html lang="fr">
@@ -428,11 +434,11 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getContent());
-        $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
+        $this->assertInstanceOf(JSLikeHTMLElement::class, $readability->getTitle());
     }
 
-    public function testPostFilters()
+    public function testPostFilters(): void
     {
         $readability = $this->getReadability('<div>' . str_repeat('<p>This <strong>is</strong> the awesome content :)</p>', 10) . '</div>', 'http://0.0.0.0');
         $readability->addPostFilter('!<strong[^>]*>(.*?)</strong>!is', '');
@@ -440,26 +446,24 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertContains('This  the awesome content :)', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This  the awesome content :)', $readability->getContent()->getInnerHtml());
     }
 
-    public function testPreFilters()
+    public function testPreFilters(): void
     {
-        $this->markTestSkipped('Won\'t work until loadHtml() is moved in init() instead of __construct()');
-
         $readability = $this->getReadability('<div>' . str_repeat('<p>This <b>is</b> the awesome and WONDERFUL content :)</p>', 7) . '</div>', 'http://0.0.0.0');
         $readability->addPreFilter('!<b[^>]*>(.*?)</b>!is', '');
 
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertContains('This the awesome and WONDERFUL content :)', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This the awesome and WONDERFUL content :)', $readability->getContent()->getInnerHtml());
     }
 
-    public function testChildNodeGoneNull()
+    public function testChildNodeGoneNull(): void
     {
         // from http://www.ayyaantuu.net/ethiopia-targets-opposition-lawmakers/
-        $html = file_get_contents('tests/fixtures/childNodeGoesNull.html');
+        $html = (string) file_get_contents('tests/fixtures/childNodeGoesNull.html');
 
         $readability = $this->getReadability($html, 'http://0.0.0.0');
         $readability->debug = true;
@@ -469,21 +473,76 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
     }
 
-    public function testKeepFootnotes()
+    public function testKeepFootnotes(): void
     {
         // from https://www.schreibdichte.de/blog/feed-aggregator-und-spaeter-lesen-dienst-im-team
-        $html = file_get_contents('tests/fixtures/keepFootnotes.html');
+        $html = (string) file_get_contents('tests/fixtures/keepFootnotes.html');
 
         $readability = $this->getReadability($html, 'http://0.0.0.0');
         $readability->debug = true;
         $res = $readability->init();
 
         $this->assertTrue($res);
-        $this->assertContains('<sup id="fnref1:fnfeed_2"><a href="#fn:fnfeed_2" class="footnote-ref">2</a></sup>', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<sup id="fnref1:fnfeed_2"><a href="#fn:fnfeed_2" class="footnote-ref">2</a></sup>', $readability->getContent()->getInnerHtml());
-        $this->assertContains('<a href="#fnref1:fnfeed_2" rev="footnote"', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<a href="#fnref1:fnfeed_2" rev="footnote"', $readability->getContent()->getInnerHtml());
     }
 
-    private function getReadability($html, $url = null, $parser = 'libxml', $useTidy = true)
+    public function testWithWipedBody(): void
+    {
+        // from https://www.cs.cmu.edu/~rgs/alice-table.html
+        $html = (string) file_get_contents('tests/fixtures/wipedBody.html');
+
+        $readability = $this->getReadability($html, 'http://0.0.0.0', 'libxml', false);
+        $readability->debug = true;
+        $res = $readability->init();
+
+        $this->assertTrue($res);
+        $this->assertStringContainsString('<a href="alice-I.html">Down the Rabbit-Hole</a>', $readability->getContent()->getInnerHtml());
+    }
+
+    public function dataForVisibleNode(): array
+    {
+        return [
+            'visible node' => [
+                '<div>' . str_repeat('<p>This <b>is</b> the awesome and WONDERFUL content :)</p>', 7) . '</div>',
+                true,
+            ],
+            'display=none' => [
+                '<div style="display:none;">' . str_repeat('<p>This <b>is</b> the awesome and WONDERFUL content :)</p>', 7) . '</div>',
+                false,
+            ],
+            'display=inline' => [
+                '<div style="display:inline;">' . str_repeat('<p>This <b>is</b> the awesome and WONDERFUL content :)</p>', 7) . '</div>',
+                true,
+            ],
+            'hidden attribute' => [
+                '<div hidden>' . str_repeat('<p>This <b>is</b> the awesome and WONDERFUL content :)</p>', 7) . '</div>',
+                false,
+            ],
+            'missing display' => [
+                '<div style="color:#ccc;">' . str_repeat('<p>This <b>is</b> the awesome and WONDERFUL content :)</p>', 7) . '</div>',
+                true,
+            ],
+        ];
+    }
+
+    /**
+     * @dataProvider dataForVisibleNode
+     */
+    public function testVisibleNode(string $content, bool $shouldBeVisible): void
+    {
+        $readability = $this->getReadability($content, 'http://0.0.0.0');
+        $readability->debug = true;
+        $res = $readability->init();
+
+        if ($shouldBeVisible) {
+            $this->assertStringContainsString('WONDERFUL content', $readability->getContent()->getInnerHtml());
+        } else {
+            $this->assertStringNotContainsString('WONDERFUL content', $readability->getContent()->getInnerHtml());
+        }
+    }
+
+    private function getReadability(string $html, string $url = null, string $parser = 'libxml', bool $useTidy = true): Readability
     {
         $readability = new Readability($html, $url, $parser, $useTidy);
 

tests/fixtures/wipedBody.html

@@ -0,0 +1,67 @@
+
+<HTML>
+<HEAD>
+<TITLE>Alice's Adventures in Wonderland (Project Gutenberg)</TITLE>
+</HEAD>
+
+<frameset Rows="50, *">
+<frame src="alice-finfo.html">
+<frame src="alice-ftitle.html" name="alice-main">
+</frameset>
+
+<noframes>
+<BODY>
+<H1>Alice's Adventures in Wonderland</H1>
+                          <H1>Lewis Carroll</H1>
+               <H1>The Millennium Fulcrum Edition 3.0</H1>
+
+NOTE:  This is a hypertext formatted version of the Project Gutenberg edition.
+For more information, check the
+<A HREF="alice-small.txt">small print</A>
+or check out the
+<A HREF="ftp://uiarchive.cso.uiuc.edu/pub/etext/gutenberg/etext91/alice30.txt">
+full ascii text</A>.  The original Tenniel illustrations are also available
+due to the efforts of Project Gutenberg.  You can if you like, grab them as a
+<A HREF="ftp://uiarchive.cso.uiuc.edu/pub/etext/gutenberg/etext94/algif10.zip">
+"zip file"</A> or read the <A HREF="algif-small.txt">small print</A>
+that comes with them.
+This document is part of a small, but growing collection of html formatted
+etexts.  (Others may be found in either my <A
+HREF="http://www.cs.cmu.edu/Web/People/rgs/rgs-home.html">home page</A> or
+John Ockerbloom's indexes by <A
+HREF="http://www.cs.cmu.edu/Web/bookauthors.html">author</A> and <A
+HREF="http://www.cs.cmu.edu/Web/booktitles.html">title</A>.)
+I am still trying to figure out whether anyone else is interested in these
+on-line readable documents.  If you appreciate this document or would like to
+see more such, send me mail at "rgs@cs.cmu.edu".
+<P>
+<A HREF="alice01a.gif"><IMG SRC="alice01th.gif"></A>
+<P>
+<H2>CONTENTS</H2>
+<PRE>
+    CHAPTER I:    <A HREF="alice-I.html">Down the Rabbit-Hole</A>
+    CHAPTER II:   <A HREF="alice-II.html">The Pool of Tears</A>
+    CHAPTER III:  <A HREF="alice-III.html">A Caucus-Race and a Long Tale</A>
+    CHAPTER IV:   <A HREF="alice-IV.html">The Rabbit Sends in a Little Bill</A>
+    CHAPTER V:    <A HREF="alice-V.html">Advice from a Caterpillar</A>
+    CHAPTER VI:   <A HREF="alice-VI.html">Pig and Pepper</A>
+    CHAPTER VII:  <A HREF="alice-VII.html">A Mad Tea-Party</A>
+    CHAPTER VIII: <A HREF="alice-VIII.html">The Queen's Croquet-Ground</A>
+    CHAPTER IX:   <A HREF="alice-IX.html">The Mock Turtle's Story</A>
+    CHAPTER X:    <A HREF="alice-X.html">The Lobster Quadrille</A>
+    CHAPTER XI:   <A HREF="alice-XI.html">Who Stole the Tarts?</A>
+    CHAPTER XII:  <A HREF="alice-XII.html">Alice's Evidence</A>
+</PRE>
+
+<ADDRESS><A HREF="mailto:rgs@cs.cmu.edu">Robert Stockton</A></ADDRESS>
+<P>
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+</HTML>