private function _readfile_chunked($filename, $retbytes = true)
{
$filename = str_replace('..', '', $filename);
$chunk_size = 1024 * 1024;
$buffer = '';
$cnt = 0;
$handle = fopen($filename, 'rb');
if ($handle === false) {
return false;
}
while (!feof($handle)) {
$buffer = fread($handle, $chunk_size);
echo $buffer;
ob_flush();
flush();
if ($retbytes) {
$cnt += strlen($buffer);
}
}
$status = fclose($handle);
if ($retbytes && $status) {
return $cnt;
// return num. bytes delivered like readfile() does.
}
return $status;
}