1.前台

2后台

public function downfile(){    ob_start();    $id = I('get.id');    $bpapplys = D('Bpapply')->selectOne($id);    //上线后需要修改路径为绝对路径，否则下载不全    $fileurl="http://www.jjfuhuaqi.com/Upload/bpapply/".$bpapplys['bp_bpimg'];    set_time_limit(0);    ini_set('memory_limit', '512M');    header('Content-Type: application/octet-stream');    header('Content-Disposition: attachment; filename='.basename($fileurl));    header('Content-Transfer-Encoding: binary');    ob_end_clean();    $size = readfile($fileurl);    header( "Accept-Length: " .$size);}