$localfile = 'audit01.jpg';
//主文件上传
$file_info1 = $fastdfs ->upload_filename($localfile,'','extjpg');
$file_info2 = $fastdfs->upload_slave_filename($localfile, $file_info1['group_name'],$file_info1['filename'],'_1');
$filename = $fastdfs->get_slave_filename($file_info1['filename'],'_1');
print_r($file_info1).'';
print_r($file_info2).'';
print_r($filename).'';
/*
Array ( [group_name] => group1 [filename] => M00/01/61/wKh_DFCKSanwmFuPAAC0tiRfdZI.extjpg )
Array ( [group_name] => group1 [filename] => M00/01/61/wKh_DFCKSanwmFuPAAC0tiRfdZI_1.jpg )