Merge pull request #74 from Kdecherf/fix/pre-filters-failure

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>

.github/FUNDING.yml

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

.github/workflows/coding-standards.yml

@@ -14,12 +14,12 @@ env:
 jobs:
   coding-standards:
     name: "CS Fixer & PHPStan"
-    runs-on: "ubuntu-18.04"
+    runs-on: "ubuntu-20.04"
 
     strategy:
       matrix:
         php:
-          - "7.3"
+          - "7.4"
 
     steps:
       - name: "Checkout"
@@ -30,7 +30,7 @@ jobs:
         with:
           coverage: "none"
           php-version: "${{ matrix.php }}"
-          tools: cs2pr, composer:v1
+          tools: cs2pr, composer:v2
           ini-values: "date.timezone=Europe/Paris"
         env:
           COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/continuous-integration.yml

@@ -14,7 +14,7 @@ env:
 jobs:
   phpunit:
     name: "PHPUnit (PHP ${{ matrix.php }})"
-    runs-on: "ubuntu-18.04"
+    runs-on: "ubuntu-20.04"
 
     strategy:
       matrix:
@@ -25,6 +25,7 @@ jobs:
           - "7.2"
           - "7.3"
           - "7.4"
+          - "8.0"
 
     steps:
       - name: "Checkout"
@@ -65,7 +66,7 @@ jobs:
 
   phpunit-coverage:
     name: "PHPUnit coverage (PHP ${{ matrix.php }})"
-    runs-on: "ubuntu-18.04"
+    runs-on: "ubuntu-20.04"
 
     strategy:
       matrix:
@@ -118,7 +119,7 @@ jobs:
 
   phpunit-lowest:
     name: "PHPUnit lowest deps (PHP ${{ matrix.php }})"
-    runs-on: "ubuntu-18.04"
+    runs-on: "ubuntu-20.04"
 
     strategy:
       matrix:
@@ -161,7 +162,7 @@ jobs:
 
   phpunit-composerv2:
     name: "PHPUnit with Composer v2 (PHP ${{ matrix.php }})"
-    runs-on: "ubuntu-18.04"
+    runs-on: "ubuntu-20.04"
 
     strategy:
       matrix:

.php-cs-fixer.php

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

.travis.yml

@@ -1,34 +0,0 @@
-dist: xenial
-os: linux
-language: php
-
-# avoid double Travis build when the PR is created on upstream
-if: |
-    type = pull_request OR \
-    branch = master
-
-jobs:
-    include:
-        - php: 8.0
-          env: SYMFONY_PHPUNIT_VERSION=7.5
-    fast_finish: true
-    allow_failures:
-        - php: 8.0
-
-cache:
-    directories:
-        - $HOME/.composer/cache/files
-
-before_install:
-    - if [ -n "$GH_TOKEN" ]; then composer config github-oauth.github.com ${GH_TOKEN}; fi;
-
-install:
-    - if [ "$CS_FIXER" != "run" ]; then composer remove friendsofphp/php-cs-fixer --dev --no-progress --no-update ; fi;
-    - composer update --prefer-dist --no-progress --no-suggest -o $
-    - php vendor/bin/simple-phpunit install
-
-before_script:
-    - mkdir -p build/logs
-
-script:
-    - php vendor/bin/simple-phpunit -v

README.md

@@ -1,7 +1,6 @@
 # Readability
 
 ![CI](https://github.com/j0k3r/php-readability/workflows/CI/badge.svg)
-[![Build Status](https://travis-ci.org/j0k3r/php-readability.svg?branch=master)](https://travis-ci.org/j0k3r/php-readability)
 [![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)

composer.json

@@ -32,7 +32,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.14",
         "monolog/monolog": "^1.24|^2.1",
-        "symfony/phpunit-bridge": "^4.2.3"
+        "symfony/phpunit-bridge": "^4.4|^5.3"
     },
     "suggest": {
         "ext-tidy": "Used to clean up given HTML and to avoid problems with bad HTML structure."

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) {
-            $this->removeChild($this->childNodes->item($x));
+        if (isset($this->childNodes)) {
+            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) {
-                $inner .= $this->ownerDocument->saveXML($child);
+            if (isset($this->childNodes)) {
+                foreach ($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()

src/Readability.php

@@ -137,10 +137,6 @@ class Readability implements LoggerAwareInterface
     protected $useTidy;
     // raw HTML filters
     protected $pre_filters = [
-        // remove obvious scripts
-        '!<script[^>]*>(.*?)</script>!is' => '',
-        // remove obvious styles
-        '!<style[^>]*>(.*?)</style>!is' => '',
         // remove spans as we redefine styles and they're probably special-styled
         '!</?span[^>]*>!is' => '',
         // HACK: firewall-filtered content
@@ -157,7 +153,7 @@ class Readability implements LoggerAwareInterface
         // replace excessive br's
         '/<br\s*\/?>\s*<p/i' => '<p',
         // replace empty tags that break layouts
-        '!<(?:a|div|p)[^>]+/>!is' => '',
+        '!<(?:a|div|p|figure)[^>]+/>!is' => '',
         // remove all attributes on text tags
         //'!<(\s*/?\s*(?:blockquote|br|hr|code|div|article|span|footer|aside|p|pre|dl|li|ul|ol)) [^>]+>!is' => "<\\1>",
         //single newlines cleanup
@@ -187,6 +183,9 @@ class Readability implements LoggerAwareInterface
         $this->loadHtml();
     }
 
+    /**
+     * @return void
+     */
     public function setLogger(LoggerInterface $logger)
     {
         $this->logger = $logger;
@@ -291,6 +290,11 @@ class Readability implements LoggerAwareInterface
         $innerDiv->appendChild($articleContent);
         $overlay->appendChild($innerDiv);
 
+        // without tidy the body can (sometimes) be wiped, so re-create it
+        if (false === isset($this->body->childNodes)) {
+            $this->body = $this->dom->createElement('body');
+        }
+
         // Clear the old HTML, insert the new content.
         $this->body->setInnerHtml('');
         $this->body->appendChild($overlay);
@@ -335,9 +339,9 @@ class Readability implements LoggerAwareInterface
             $footnoteLink = $articleLink->cloneNode(true);
             $refLink = $this->dom->createElement('a');
             $footnote = $this->dom->createElement('li');
-            $linkDomain = @parse_url($footnoteLink->getAttribute('href'), PHP_URL_HOST);
+            $linkDomain = @parse_url($footnoteLink->getAttribute('href'), \PHP_URL_HOST);
             if (!$linkDomain && isset($this->url)) {
-                $linkDomain = @parse_url($this->url, PHP_URL_HOST);
+                $linkDomain = @parse_url($this->url, \PHP_URL_HOST);
             }
 
             $linkText = $this->getInnerText($articleLink);
@@ -389,6 +393,9 @@ class Readability implements LoggerAwareInterface
 
         $this->logger->debug($this->lightClean ? 'Light clean enabled.' : 'Standard clean enabled.');
 
+        $this->clean($articleContent, 'style');
+        $this->clean($articleContent, 'script');
+
         $this->cleanStyles($articleContent);
         $this->killBreaks($articleContent);
 
@@ -934,7 +941,7 @@ class Readability implements LoggerAwareInterface
             case 'DD':
             case 'DT':
             case 'LI':
-                $readability->value -= 2 * round($this->getLinkDensity($node), 0, PHP_ROUND_HALF_UP);
+                $readability->value -= 2 * round($this->getLinkDensity($node), 0, \PHP_ROUND_HALF_UP);
                 break;
             case 'ASIDE':
             case 'FOOTER':
@@ -988,6 +995,12 @@ class Readability implements LoggerAwareInterface
         for ($nodeIndex = 0; ($node = $allElements->item($nodeIndex)); ++$nodeIndex) {
             $tagName = $node->tagName;
 
+            $nodeContent = $node->getInnerHTML();
+            if (empty($nodeContent)) {
+                $this->logger->debug('Skipping empty node');
+                continue;
+            }
+
             // Some well known site uses sections as paragraphs.
             if (0 === strcasecmp($tagName, 'p') || 0 === strcasecmp($tagName, 'td') || 0 === strcasecmp($tagName, 'pre') || 0 === strcasecmp($tagName, 'section')) {
                 $nodesToScore[] = $node;
@@ -996,11 +1009,11 @@ class Readability implements LoggerAwareInterface
             // Turn divs into P tags where they have been used inappropriately
             //  (as in, where they contain no other block level elements).
             if (0 === strcasecmp($tagName, 'div') || 0 === strcasecmp($tagName, 'article') || 0 === strcasecmp($tagName, 'section')) {
-                if (!preg_match($this->regexps['divToPElements'], $node->getInnerHTML())) {
+                if (!preg_match($this->regexps['divToPElements'], $nodeContent)) {
                     $newNode = $this->dom->createElement('p');
 
                     try {
-                        $newNode->setInnerHtml($node->getInnerHTML());
+                        $newNode->setInnerHtml($nodeContent);
 
                         $node->parentNode->replaceChild($newNode, $node);
                         --$nodeIndex;
@@ -1025,7 +1038,7 @@ class Readability implements LoggerAwareInterface
                             continue;
                         }
 
-                        if (XML_TEXT_NODE === $childNode->nodeType) {
+                        if (\XML_TEXT_NODE === $childNode->nodeType) {
                             $p = $this->dom->createElement('p');
                             $p->setInnerHtml($childNode->nodeValue);
                             $p->setAttribute('data-readability-styled', 'true');
@@ -1151,7 +1164,7 @@ class Readability implements LoggerAwareInterface
                 // relatively small link density (5% or less) and be mostly unaffected by this operation.
                 // If not for this we would have used XPath to find maximum @readability.
                 $readability = $item->getAttributeNode('readability');
-                $readability->value = round($readability->value * (1 - $this->getLinkDensity($item)), 0, PHP_ROUND_HALF_UP);
+                $readability->value = round($readability->value * (1 - $this->getLinkDensity($item)), 0, \PHP_ROUND_HALF_UP);
 
                 if (!$topCandidate || $readability->value > (int) $topCandidate->getAttribute('readability')) {
                     $this->logger->debug('Candidate: ' . $item->getNodePath() . ' (' . $item->getAttribute('class') . ':' . $item->getAttribute('id') . ') with score ' . $readability->value);
@@ -1223,7 +1236,7 @@ class Readability implements LoggerAwareInterface
             $siblingNode = $siblingNodes->item($s);
             $siblingNodeName = $siblingNode->nodeName;
             $append = false;
-            $this->logger->debug('Looking at sibling node: ' . $siblingNode->getNodePath() . ((XML_ELEMENT_NODE === $siblingNode->nodeType && $siblingNode->hasAttribute('readability')) ? (' with score ' . $siblingNode->getAttribute('readability')) : ''));
+            $this->logger->debug('Looking at sibling node: ' . $siblingNode->getNodePath() . ((\XML_ELEMENT_NODE === $siblingNode->nodeType && $siblingNode->hasAttribute('readability')) ? (' with score ' . $siblingNode->getAttribute('readability')) : ''));
 
             if ($siblingNode->isSameNode($topCandidate)) {
                 $append = true;
@@ -1232,11 +1245,11 @@ class Readability implements LoggerAwareInterface
             $contentBonus = 0;
 
             // Give a bonus if sibling nodes and top candidates have the same classname.
-            if (XML_ELEMENT_NODE === $siblingNode->nodeType && $siblingNode->getAttribute('class') === $topCandidate->getAttribute('class') && '' !== $topCandidate->getAttribute('class')) {
+            if (\XML_ELEMENT_NODE === $siblingNode->nodeType && $siblingNode->getAttribute('class') === $topCandidate->getAttribute('class') && '' !== $topCandidate->getAttribute('class')) {
                 $contentBonus += ((int) $topCandidate->getAttribute('readability')) * 0.2;
             }
 
-            if (XML_ELEMENT_NODE === $siblingNode->nodeType && $siblingNode->hasAttribute('readability') && (((int) $siblingNode->getAttribute('readability')) + $contentBonus) >= $siblingScoreThreshold) {
+            if (\XML_ELEMENT_NODE === $siblingNode->nodeType && $siblingNode->hasAttribute('readability') && (((int) $siblingNode->getAttribute('readability')) + $contentBonus) >= $siblingScoreThreshold) {
                 $append = true;
             }
 
@@ -1381,7 +1394,7 @@ class Readability implements LoggerAwareInterface
         $this->logger->debug('Parsing URL: ' . $this->url);
 
         if ($this->url) {
-            $this->domainRegExp = '/' . strtr(preg_replace('/www\d*\./', '', parse_url($this->url, PHP_URL_HOST)), ['.' => '\.']) . '/';
+            $this->domainRegExp = '/' . strtr(preg_replace('/www\d*\./', '', parse_url($this->url, \PHP_URL_HOST)), ['.' => '\.']) . '/';
         }
 
         mb_internal_encoding('UTF-8');
@@ -1428,7 +1441,7 @@ class Readability implements LoggerAwareInterface
 
             $this->dom = new \DOMDocument();
             $this->dom->preserveWhiteSpace = false;
-            $this->dom->loadHTML($this->html, LIBXML_NOBLANKS | LIBXML_COMPACT | LIBXML_NOERROR);
+            $this->dom->loadHTML($this->html, \LIBXML_NOBLANKS | \LIBXML_COMPACT | \LIBXML_NOERROR);
 
             libxml_use_internal_errors(false);
         }

tests/ReadabilityTest.php

@@ -26,9 +26,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
     {
         $readability = $this->getReadability('<html/>', 'http://0.0.0.0', 'html5lib');
 
-        $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);
     }
 
     /**
@@ -38,9 +38,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
     {
         $readability = $this->getReadability('<html/>', 'http://0.0.0.0');
 
-        $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);
     }
 
@@ -49,7 +49,7 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $readability = $this->getReadability('', null, 'libxml', false);
 
         $this->assertNull($readability->url);
-        $this->assertEquals('', $readability->original_html);
+        $this->assertSame('', $readability->original_html);
         $this->assertFalse($readability->tidied);
 
         $this->assertInstanceOf('DomDocument', $readability->dom);
@@ -59,9 +59,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
     {
         $readability = $this->getReadability('<html/>', 'http://0.0.0.0', 'libxml', false);
 
-        $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);
     }
 
@@ -74,7 +74,7 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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()
@@ -85,9 +85,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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()
@@ -98,9 +98,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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()
@@ -112,9 +112,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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()
@@ -127,11 +127,11 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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->assertContains('readabilityFootnoteLink', $readability->getContent()->getInnerHtml());
-        $this->assertContains('readabilityLink-3', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('readabilityFootnoteLink', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('readabilityLink-3', $readability->getContent()->getInnerHtml());
     }
 
     public function testStandardClean()
@@ -144,11 +144,11 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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->assertContains('will NOT be removed', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('<h2>', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('will NOT be removed', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('<h2>', $readability->getContent()->getInnerHtml());
     }
 
     public function testWithIframe()
@@ -160,10 +160,10 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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->assertContains('nofollow', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('nofollow', $readability->getContent()->getInnerHtml());
     }
 
     public function testWithArticle()
@@ -175,10 +175,10 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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->assertContains('nofollow', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('nofollow', $readability->getContent()->getInnerHtml());
     }
 
     public function testWithAside()
@@ -191,9 +191,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
-        $this->assertNotContains('<aside>', $readability->getContent()->getInnerHtml());
-        $this->assertContains('<footer readability="5"/>', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('<aside>', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('<footer readability="5"/>', $readability->getContent()->getInnerHtml());
     }
 
     public function testWithClasses()
@@ -205,10 +205,10 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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->assertNotContains('This text should be removed', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text should be removed', $readability->getContent()->getInnerHtml());
     }
 
     public function testWithClassesWithoutLightClean()
@@ -221,10 +221,10 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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->assertNotContains('This text should be removed', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text should be removed', $readability->getContent()->getInnerHtml());
     }
 
     public function testWithTd()
@@ -237,7 +237,7 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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()
@@ -250,8 +250,8 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('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 is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
     public function testWithScript()
@@ -264,8 +264,8 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
         $this->assertEmpty($readability->getTitle()->getInnerHtml());
-        $this->assertContains('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->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
     public function testTitle()
@@ -277,9 +277,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
-        $this->assertEquals('this is my title', $readability->getTitle()->getInnerHtml());
-        $this->assertContains('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->assertSame('this is my title', $readability->getTitle()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
     public function testTitleWithDash()
@@ -291,9 +291,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
-        $this->assertEquals('title2 - title3', $readability->getTitle()->getInnerHtml());
-        $this->assertContains('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->assertSame('title2 - title3', $readability->getTitle()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
     public function testTitleWithDoubleDot()
@@ -305,9 +305,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
-        $this->assertEquals('title2 : title3', $readability->getTitle()->getInnerHtml());
-        $this->assertContains('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->assertSame('title2 : title3', $readability->getTitle()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $readability->getContent()->getInnerHtml());
+        $this->assertStringNotContainsString('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
     }
 
     public function testTitleTooShortUseH1()
@@ -319,9 +319,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getTitle());
-        $this->assertEquals('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->assertNotContains('This text is also an awesome text and you should know that', $readability->getContent()->getInnerHtml());
+        $this->assertSame('this is my h1 title !', $readability->getTitle()->getInnerHtml());
+        $this->assertStringContainsString('This is an awesome text with some links, here there are', $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
@@ -332,9 +332,9 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
 
     public function testAutoClosingIframeNotThrowingException()
     {
-        error_reporting(E_ALL | E_STRICT);
+        error_reporting(\E_ALL | \E_STRICT);
         ini_set('display_errors', true);
-        set_error_handler([$this, 'error2Exception'], E_ALL | E_STRICT);
+        set_error_handler([$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#">
@@ -369,8 +369,8 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($res);
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $readability->getContent());
         $this->assertInstanceOf('Readability\JSLikeHTMLElement', $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->assertContains('3D Touch', $readability->getTitle()->getInnerHtml());
+        $this->assertStringContainsString('<iframe src="https://www.youtube.com/embed/PUep6xNeKjA" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"> </iframe>', $readability->getContent()->getInnerHtml());
+        $this->assertStringContainsString('3D Touch', $readability->getTitle()->getInnerHtml());
     }
 
     /**
@@ -440,7 +440,7 @@ 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()
@@ -453,7 +453,7 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $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()
@@ -479,8 +479,21 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
         $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->assertContains('<a href="#fnref1:fnfeed_2" rev="footnote"', $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->assertStringContainsString('<a href="#fnref1:fnfeed_2" rev="footnote"', $readability->getContent()->getInnerHtml());
+    }
+
+    public function testWithWipedBody()
+    {
+        // from https://www.cs.cmu.edu/~rgs/alice-table.html
+        $html = 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());
     }
 
     private function getReadability($html, $url = null, $parser = 'libxml', $useTidy = true)

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>
+<!- Access counter added 5/25 1:49am ->
+<A href="http://www.dbasics.com/cgi-bin/pages.cgi?143205747"><IMG SRC="http://www.dbasics.com/cgi-bin/counter.cgi?143205747.2&(none)"></A> Access statistics from htmlZine
+<!- This page has been visited
+A HREF="http://counter.digits.com/wc?--info=yes&--name=rgsalice"
+IMG SRC="http://counter.digits.com/wc/-d/4/-r/-z/rgsalice"
+ ALIGN=absmiddle WIDTH=60 HEIGHT=20 BORDER=0 HSPACE=4 ALT="????"/A
+times since March 2, 1996. ->
+</BODY>
+</noframes>
+</HTML>