thinkphp mpdf html生成pdf

echo $mpdf->pdf_version;  //输出1.4

<?php
/**
* Created by PhpStorm.
* User: Administrator
* Date: 2015/9/11
* Time: 9:25
*/

namespace Home\Controller;

use Think\Controller;
use mPDF;

class PdfController extends Controller
{
public function  test1()
{
vendor("MPdf.mpdf");
$mpdf = new mPDF();
$mpdf->WriteHTML('<p>Hallo World</p>');
$mpdf->Output();
exit;
}
}

$url = 'http://www.baidu.com/';
$strContent = file_get_contents($url);

$mpdf->Output('ss.pdf');

$mpdf = new mPDF ( 'zh-CN/utf-8' );
$html ="你";
$mpdf->WriteHTML ( $html );
$mpdf->Output ();