Neos\FluidAdaptor\View\TemplatePaths::createIdentifierForFile PHP Method

    protected function createIdentifierForFile($pathAndFilename, $prefix)
    {
        $templateModifiedTimestamp = 0;
        $isStandardInput = $pathAndFilename === 'php://stdin';
        $isFile = is_file($pathAndFilename);
        if ($isStandardInput === false && $isFile === false) {
            throw new InvalidTemplateResourceException(sprintf('The fluid file "%s" was not found.', $pathAndFilename), 1475831187);
        }
        if ($isStandardInput === false) {
            $templateModifiedTimestamp = filemtime($pathAndFilename);
        }
        return sprintf('%s_%s', $prefix, sha1($pathAndFilename . '|' . $templateModifiedTimestamp));
    }