Raml\Parser::loadAndParseFile PHP Method

    private function loadAndParseFile($fileName, $rootDir)
    {
        $rootDir = realpath($rootDir);
        $fullPath = realpath($rootDir . '/' . $fileName);
        if (is_readable($fullPath) === false) {
            return false;
        }
        // Prevent LFI directory traversal attacks
        if (!$this->configuration->isDirectoryTraversalAllowed() && substr($fullPath, 0, strlen($rootDir)) !== $rootDir) {
            return false;
        }
        $cacheKey = md5($fullPath);
        // cache based on file name, prevents including/parsing the same file multiple times
        if (isset($this->cachedFiles[$cacheKey])) {
            return $this->cachedFiles[$cacheKey];
        }
        $fileExtension = pathinfo($fileName, PATHINFO_EXTENSION);
        if (in_array($fileExtension, ['yaml', 'yml', 'raml'])) {
            $rootDir = dirname($rootDir . '/' . $fileName);
            // RAML and YAML files are always parsed
            $fileData = $this->parseRamlString(file_get_contents($fullPath), $rootDir);
            $fileData = $this->includeAndParseFiles($fileData, $rootDir);
        } else {
            if (in_array($fileExtension, array_keys($this->fileLoaders))) {
                $loader = $this->fileLoaders[$fileExtension];
            } else {
                $loader = $this->fileLoaders['*'];
            }
            $fileData = $loader->loadFile($fullPath);
            $this->cachedFilesPaths[md5($fileData)] = $fullPath;
        }
        // cache before returning
        $this->cachedFiles[$cacheKey] = $fileData;
        return $fileData;
    }