如何在已加载的页面上生成和显示 TCPDF pdf？

Question

我正在尝试使用 TCPDF 即时生成 PDF 并将其显示在浏览器中。

我已经...

将 PDF 作为下载输出
不带任何内联输出 PDF HTML。（使用 $pdf->Output('example_007.pdf', 'I');

我想做的是...

输出已打印 HTML 的内联 PDF，而不清除 HTML。

自然我运行进入TCPDF ERROR: Some data has already been output, can't send PDF file问题。我设法使用 ob 函数消除了这个错误，例如 ob_start 或 ob_flush；但是，这会清除我现有的 HTML。

我尝试在通过 AJAX 调用的 PHP 文件上输出 PDF（纯 JavaScript）；但是，我对此没有任何运气。什么都没有出现。

那么当内容已经输出时，如何在浏览器中显示 PDF？

我或多或少在寻找类似以下的东西：

我目前正在使用测试页执行此操作，这是我的代码：...大部分来自 TCPDF 的示例。

//The following PHP block was tried but also failed as it wiped existing HTML
<?php
    ob_start();
?>

<!DOCTYPE html>
<html>
    <head>
        <title>Test PDF</title>
    </head>
    <body>
        <h1>Before PDF</h1>
        <?php
            error_Reporting(E_ALL);

            date_default_timezone_set("America/New_York");

            // Include the main TCPDF library (search for installation path).
            require_once $_SERVER["DOCUMENT_ROOT"]."/my-site/TCPDF-master/tcpdf.php";

            //ob_start() Tried this at some point... Didn't work

            // create new PDF document
            $pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

            // set document information
            $pdf->SetCreator(PDF_CREATOR);
            $pdf->SetAuthor('Nicola Asuni');
            $pdf->SetTitle('TCPDF Example 001');
            $pdf->SetSubject('TCPDF Tutorial');
            $pdf->SetKeywords('TCPDF, PDF, example, test, guide');

            // set default header data
            $pdf->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE.' 001', PDF_HEADER_STRING, array(0,64,255), array(0,64,128));
            $pdf->setFooterData(array(0,64,0), array(0,64,128));

            // set header and footer fonts
            $pdf->setHeaderFont(Array(PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN));
            $pdf->setFooterFont(Array(PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA));

            // set default monospaced font
            $pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);

            // set margins
            $pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
            $pdf->SetHeaderMargin(PDF_MARGIN_HEADER);
            $pdf->SetFooterMargin(PDF_MARGIN_FOOTER);

            // set auto page breaks
            $pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);

            // set image scale factor
            $pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);

            // set some language-dependent strings (optional)
            if (@file_exists(dirname(__FILE__).'/lang/eng.php')) {
                require_once(dirname(__FILE__).'/lang/eng.php');
                $pdf->setLanguageArray($l);
            }

            // ---------------------------------------------------------

            // set default font subsetting mode
            $pdf->setFontSubsetting(true);

            // Set font
            // dejavusans is a UTF-8 Unicode font, if you only need to
            // print standard ASCII chars, you can use core fonts like
            // helvetica or times to reduce file size.
            $pdf->SetFont('dejavusans', '', 14, '', true);

            // Add a page
            // This method has several options, check the source code documentation for more information.
            $pdf->AddPage();

            // set text shadow effect
            $pdf->setTextShadow(array('enabled'=>true, 'depth_w'=>0.2, 'depth_h'=>0.2, 'color'=>array(196,196,196), 'opacity'=>1, 'blend_mode'=>'Normal'));

            // Set some content to print
            $html = "
                <h1>Hello World!</h1>
            ";

            // Print text using writeHTMLCell()
            $pdf->writeHTMLCell(0, 0, '', '', $html, 0, 1, 0, true, '', true);

            // ---------------------------------------------------------

            // Close and output PDF document
            // This method has several options, check the source code documentation for more information.

            //ob_clean(); Various posts suggested various combinations of these methods
            //ob_flush();
            $pdf->Output('example_007.pdf', 'I');
            //ob_end_flush();
            //ob_end_clean();
        ?>
    </body>
</html>

Answer 1

使用与内联显示相同的技术，您可以尝试使用 Iframe 加载 PDF 文件：

<html>
    <head>
    </head>
    <body>
        <p>some content</p>
        <iframe src="/path/to/your/pdf/script.php"></iframe>
    </body>
</html>

如何在已加载的页面上生成和显示 TCPDF pdf？

How to generate and display TCPDF pdf on a page that has already loaded?

html

php

tcpdf