write final file procedure #5

$file_path = rtrim($conf['target_dir'], DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR . $file_name;
 // Open temp file
 if (!$out = @fopen("{$file_path}.part", $conf['chunks'] ? "ab" : "wb")) {
 throw new Exception('', PLUPLOAD_OUTPUT_ERR);
 }
 if (!empty($_FILES)) {
 if ($_FILES["file"]["error"] || !is_uploaded_file($_FILES["file"]["tmp_name"])) {
 throw new Exception('', PLUPLOAD_MOVE_ERR);
 }
 // Read binary input stream and append it to temp file
 if (!$in = @fopen($_FILES["file"]["tmp_name"], "rb")) {
 throw new Exception('', PLUPLOAD_INPUT_ERR);
 }
 }
 while ($buff = fread($in, 4096)) {
 fwrite($out, $buff);
 }
 @fclose($out);
 @fclose($in);
 // Check if file has been uploaded
 if (!$conf['chunks'] || $conf['chunk'] == $conf['chunks'] - 1) {
 // Strip the temp .part suffix off
 rename("{$file_path}.part", $file_path);
 }
 return array(
 'name' => $file_name,
 'path' => $file_path,
 //'size' => filesize($file_path)
 );