$file_old = request()->get('file_old',''); $file_new = request()->get('file_new',''); if(!is_dir(dirname($file_new))){ mkdir(dirname($file_new),0777,true); } copy($file_old,$file_new); if(md5_file($file_old)==md5_file($file_new)){ return jssuccess('替换成功'); }else{ return jserror('替换失败,请检查权限'); }