Download file via PHP script from FTP server to browser with Content-Length header without storing the file on the web server

Just remove the output buffering (ob_start() and the others). Use just this: ftp_get($conn_id, “php://output”, $file, FTP_BINARY); Though if you want to add Content-Length header, you have to query file size first using ftp_size: $conn_id = ftp_connect(“ftp.example.com”); ftp_login($conn_id, “username”, “password”); ftp_pasv($conn_id, true); $file_path = “remote/path/file.zip”; $size = ftp_size($conn_id, $file_path); header(“Content-Type: application/octet-stream”); header(“Content-Disposition: attachment; filename=” . basename($file_path)); … Read more