require_once 'dompdf/autoload.inc.php';

use Dompdf\Dompdf;

// 初始化 Dompdf
$dompdf = new Dompdf();

// 从多个文件读取 HTML 内容
$html1 = file_get_contents('page1.html');
$html2 = file_get_contents('page2.html');
$html3 = file_get_contents('page3.html');

// 合并 HTML 内容
$combinedHtml = $html1 . $html2 . $html3;

// 加载 HTML 内容
$dompdf->loadHtml($combinedHtml);

// 设置纸张大小和方向
$dompdf->setPaper('A4', 'portrait');

// 渲染 PDF
$dompdf->render();

// 输出 PDF
$dompdf->stream("combined_document.pdf", array("Attachment" => false));

require_once 'dompdf/autoload.inc.php';

use Dompdf\Dompdf;

$dompdf = new Dompdf();

$html1 = file_get_contents('page1.html');
$html2 = file_get_contents('page2.html');
$html3 = file_get_contents('page3.html');

// 使用 CSS 分页符分隔文档
$combinedHtml = $html1 . 
                '<div style="page-break-before: always;"></div>' . 
                $html2 . 
                '<div style="page-break-before: always;"></div>' . 
                $html3;

$dompdf->loadHtml($combinedHtml);
$dompdf->setPaper('A4', 'portrait');
$dompdf->render();
$dompdf->stream("multi_page_document.pdf");

require_once 'dompdf/autoload.inc.php';
require_once 'fpdi/src/autoload.php';

use Dompdf\Dompdf;
use setasign\Fpdi\Fpdi;

// 生成第一个 PDF
$dompdf1 = new Dompdf();
$dompdf1->loadHtml(file_get_contents('page1.html'));
$dompdf1->render();
file_put_contents('temp1.pdf', $dompdf1->output());

// 生成第二个 PDF
$dompdf2 = new Dompdf();
$dompdf2->loadHtml(file_get_contents('page2.html'));
$dompdf2->render();
file_put_contents('temp2.pdf', $dompdf2->output());

// 合并 PDF
$pdf = new Fpdi();
$files = ['temp1.pdf', 'temp2.pdf'];

foreach ($files as $file) {
    $pageCount = $pdf->setSourceFile($file);
    for ($i = 1; $i <= $pageCount; $i++) {
        $pdf->AddPage();
        $pdf->useTemplate($pdf->importPage($i));
    }
}

// 输出合并后的 PDF
$pdf->Output('merged.pdf', 'D');

// 删除临时文件
unlink('temp1.pdf');
unlink('temp2.pdf');

$dompdf->loadHtml(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));
$dompdf->set_option('defaultFont', 'SimSun'); // 设置支持中文的字体