Javascript: Handling File Downloads with PHP

This PHP snippet demonstrates how to handle file downloads by setting appropriate headers and reading files into the output buffer. It is useful for applications that need to provide users with downloads of documents, images, or other files.

The code includes checks to ensure the file exists and is readable, which helps prevent errors and security issues associated with file access.

Error handling is robust, providing clear feedback if the file cannot be downloaded due to permissions or other issues.

The snippet also demonstrates how to prevent direct file access and ensure that downloads are processed through the script, adding an extra layer of security.

This example is particularly useful for developers needing to implement controlled access to downloadable content in their web applications.