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Using PHP, I am trying to serve large files (up to possibly 200MB) which aren't in a web accessible directory due to authorization issues. Currently, I use a readfile() call along with some headers to serve the file, but it seems that PHP is loading it into memory before sending it. I intend to deploy on a shared hosting server, which won't allow me to use much memory or add my own Apache modules such as X-Sendfile. I can't let my files be in a web accessible directory for security reasons. Does anybody know a method that is less memory intensive which I could deploy on a shared hosting server? EDIT: if(/* My authorization here */) { $path = "/uploads/"; $name = $row[0]; //This is a MySQL reference with the filename $fullname = $path . $name; //Create filename $fd = fopen($fullname, "rb"); if ($fd) { $fsize = filesize($fullname); $path_parts = pathinfo($fullname); $ext = strtolower($path_parts["extension"]); switch ($ext) { case "pdf": header("Content-type: application/pdf"); break; case "zip": header("Content-type: application/zip"); break; default: header("Content-type: application/octet-stream"); break; } header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); header("Content-length: $fsize"); header("Cache-control: private"); //use this to open files directly while(!feof($fd)) { $buffer = fread($fd, 1*(1024*1024)); echo $buffer; ob_flush(); flush(); //These two flush commands seem to have helped with performance } } else { echo "Error opening file"; } fclose($fd);

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