PressBooks\Modules\Export\Xhtml\Xhtml11::validate PHP Метод

    function validate()
    {
        // Xmllint params
        $command = PB_XMLLINT_COMMAND . ' --html --valid --noout ' . escapeshellcmd($this->outputPath) . ' 2>&1';
        // Execute command
        $output = array();
        $return_var = 0;
        exec($command, $output, $return_var);
        // Is this a valid XHTML?
        if (count($output)) {
            $this->logError(implode("\n", $output));
            return false;
        }
        return true;
    }