barcode save download

barcode.php

<?php 
// ...
    public function barcodeAction()
    {
        $barcodeOptions = array('text' => 'ZEND-FRAMEWORK');
        $barcode = \Zend\Barcode\Barcode::factory('code39', 'Image', $barcodeOptions);
        
        //temporary save file into data folder
        imagegif($barcode->draw(), './data/barcode.gif');
        
        $response = $this->getResponse();
        
        //setting response header....
        $response->getHeaders()->addHeaderLine('Content-Type', 'image/gif');
        $response->getHeaders()->addHeaderLine('Content-Disposition', 'attachment; filename="barcode.gif"');
        $response->getHeaders()->addHeaderLine('Content-Length', filesize('./data/barcode.gif'));
        
        // set response with get content of pdf
        $response->setContent(file_get_contents('./data/barcode.gif'));
        
        //remove file after no need
        @unlink('./data/barcode.gif');
        
        return $response;
    }

Thank you, it works perfectly! :)