$chunkSize = 1024 * 1024; // 1MB chunks $handle = fopen($filePath, 'rb'); while (!feof($handle)) { echo fread($handle, $chunkSize); flush(); // Send the chunk to the browser immediately } fclose($handle); Use code with caution. Security Best Practices
By mastering these techniques, you can build a robust and secure file delivery system that enhances your website's interactivity and functionality. PHP - Download File - TutorialsPoint php download
: Instruct the browser on how to handle the incoming data. $chunkSize = 1024 * 1024; // 1MB chunks
: Ensure the script has the correct File Permissions to read the file but that the file isn't globally writable. Common Use Cases : Ensure the script has the correct File
When handling "PHP download" requests, security is paramount. Attackers often try to use these scripts to access sensitive system files via "directory traversal" attacks.
: Use readfile() to stream the file data to the browser.
By opening a file handle with fopen() and reading it in a loop, you ensure the server only keeps a small portion of the file in memory at any given time.