Neos\Flow\Core\Migrations\Version20150214130800::up PHP Method

    public function up()
    {
        $affectedViewHelperClassNames = array();
        $allPathsAndFilenames = Files::readDirectoryRecursively($this->targetPackageData['path'], '.php', true);
        foreach ($allPathsAndFilenames as $pathAndFilename) {
            if (substr($pathAndFilename, -14) !== 'ViewHelper.php') {
                continue;
            }
            $fileContents = file_get_contents($pathAndFilename);
            $className = (new PhpAnalyzer($fileContents))->extractFullyQualifiedClassName();
            if ($className === null) {
                $this->showWarning(sprintf('could not extract class name from file "%s"', $pathAndFilename));
                continue;
            }
            /** @noinspection PhpIncludeInspection */
            require_once $pathAndFilename;
            if (!class_exists($className)) {
                $this->showWarning(sprintf('could not load class "%s" extracted from file "%s"', $className, $pathAndFilename));
                continue;
            }
            $instance = new $className();
            $escapeOutput = ObjectAccess::getProperty($instance, 'escapeOutput', true);
            if ($escapeOutput !== null) {
                continue;
            }
            $affectedViewHelperClassNames[] = $className;
            $this->searchAndReplaceRegex('/\\R\\s*class[^\\{]+\\R?\\{(\\s*)(?=.*?\\})/s', '$0' . "\n\t" . '/**' . "\n\t" . ' * NOTE: This property has been introduced via code migration to ensure backwards-compatibility.' . "\n\t" . ' * @see AbstractViewHelper::isOutputEscapingEnabled()' . "\n\t" . ' * @var boolean' . "\n\t" . ' */' . "\n\t" . 'protected $escapeOutput = FALSE;$1', $pathAndFilename);
        }
        if ($affectedViewHelperClassNames !== array()) {
            $this->showWarning('Added "escapeOutput" property to following ViewHelpers:' . PHP_EOL . ' * ' . implode(PHP_EOL . ' * ', $affectedViewHelperClassNames) . PHP_EOL . PHP_EOL . 'If an affected ViewHelper does not render HTML output, you should set this property TRUE in order to ensure sanitization of the output!');
        }
        $this->addWarningsForAffectedViewHelpers($this->targetPackageData['path']);
    }