解决方法
require('UploadHandler.PHP');
class CustomUploadHandler extends UploadHandler {
protected function trim_file_name($file_path,$name,$size,$type,$error,$index,$content_range) {
$name = 'First_' . microtime(true);
$name = str_replace('.','',$name);
return $name;
}
}
$upload_handler = new CustomUploadHandler();