PHP使用mpdf下载PDF文件

composer require mpdf/mpdf

<?php

require_once __DIR__ . '/vendor/autoload.php';
$mpdf = new \Mpdf\Mpdf([
	'orientation' => 'L', //设置为横屏
	'margin_top' => '0', //设置上边距
	'margin_bottom' => '0' ,//设置下边距
	'format' => [190, 236], //纸张大小
	'mode' => 'utf-8',
]);



$mpdf->autoScriptToLang = true;
$mpdf->autoLangToFont = true;
$mpdf->use_kwt = false;

$html = "<table style='text-align:center'>
            <tr>
                <th><h1>Hello world!</h1></th>
            </tr>
             <tr>
                <th><h1>Hello world!</h1></th>
            </tr>
             <tr>
                <th><h1>Hello world!</h1></th>
            </tr>
             <tr>
                <th><h1>Hello world!</h1></th>
            </tr>
        </table>";

//设置水印文字
$mpdf->SetWatermarkText('Water');
$mpdf->showWatermarkText = true; 
//设置水印图片
$mpdf->SetWatermarkImage('./background.jpg');
$mpdf->showWatermarkImage = true;


$mpdf->WriteHTML($html);
$mpdf->Output('mpdf.pdf', 'I'); //D是下载