<% response.setHeader("Content-Disposition", "attachment; filename=\"file.csv\""); %> Advanced: Handling Special Characters http download file name - Stack Overflow

Forces the browser to download the file locally. How to Set a Download File Name

Understanding how to manage a is essential for web developers who want to control how users save files from their applications. Without proper header configuration, browsers may assign generic names like download.php or index.html to dynamic content, creating a poor user experience.

Used for PDFs or images that should open directly in the browser.

header('Content-Disposition: attachment; filename="report.pdf"');