Hello, with the following code, small files are served fine, however large (see, 800MB and above) result in empty files!

Would I need to do something with apache to solve this?

    <?php


    class Model_Download { 


        function __construct($path, $file_name) {


$this->full_path = $path.$file_name;
    }


    public function execute() {

        if ($fd = fopen ($this->full_path, "r")) {
            $fsize      = filesize($this->full_path);
            $path_parts = pathinfo($this->full_path);
            $ext        = strtolower($path_parts["extension"]);

            switch ($ext) {
                case "pdf":
                    header("Content-type: application/pdf"); // add here more headers for diff. extensions
                    header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); // use 'attachment' to force a download
                break;
                default;
                    header("Content-type: application/octet-stream");
                    header("Content-Disposition: filename=\"".$path_parts["basename"]."\"");
                break;
            }

            header("Content-length: $fsize");
            header("Cache-control: private"); //use this to open files directly

            while(!feof($fd)) {
                $buffer = fread($fd, 2048);
                echo $buffer;
            }
        }
        fclose ($fd);
        exit;
    }


}