dompdf-单页/ page_script上的文本不起作用 [英] dompdf - text on a single page / page_script doesnt work

问题描述

我正在使用dompdf 0.7.0，并尝试在渲染后用PHP在PHP上写下文本。我需要在特定页面上输入文字，并且从Brian
的Answer中找到以下内容： DomPDF {PAGE_NUM}不在首页上

I'm using dompdf 0.7.0 and try to write down text in PHP on my pdf after rendering. I need text on specific pages and found the following from Answer from Brian DomPDF {PAGE_NUM} not on first page

page_script函数听起来像是正确的答案。
我可以检查循环当前是否在第3页上。

The function page_script sound like the correct answer. I could check if loop is currently on page 3 or whatever.

是否需要为此功能启用任何选项？

Does I have to enable any options for this function?

示例：

    $dompdf = new Dompdf( $options );
    $dompdf->set_option('default_font', 'open sans');
    $dompdf->set_option('fontHeightRatio', 1);
    $dompdf->setPaper('A4')


    $dompdf->set_option('enable_html5_parser', true);
    $dompdf->set_option('enable_php', true);

    $dompdf->loadHtml( $html );
    $dompdf->render();

    $canvas = $dompdf->get_canvas();
    $canvas->page_script('
    if ($PAGE_NUM > 1) {
        $current_page = $PAGE_NUM-1;
        $total_pages = $PAGE_COUNT-1;
        $canvas->text(0, 0, "$current_page / $total_pages", "open sans condensed", 10, array(0,0,0));
    }
   ');

它仍显示在我的第一页上。

It still be shown on my first page.

推荐答案

$ canvas 不在页面脚本中，因为它超出了范围。可以在页面脚本内将canvas对象引用为 $ pdf 。

$canvas wouldn't be available from the page script as it is out of scope. The canvas object can be referenced inside your page script as $pdf.

请尝试以下 page_script 调用：

$canvas->page_script('
  if ($PAGE_NUM > 1) {
    $current_page = $PAGE_NUM-1;
    $total_pages = $PAGE_COUNT-1;
    $font = $fontMetrics->getFont("open sans condensed", "normal"); // or bold, italic, or bold_italic
    $pdf->text(0, 0, "$current_page / $total_pages", $font, 10, array(0,0,0));
  }
};

有一些变量可以从在页面脚本或嵌入式脚本中：

There are a few variables available from within page scripts or embedded script:

• $ PAGE_NUM ：当前页码


• $ PAGE_COUNT ：总页数


• $ pdf ：画布对象


• $ fontMetrics ：FontMetrics类的实例

• $PAGE_NUM: current page number
• $PAGE_COUNT: total number of pages
• $pdf: the canvas object
• $fontMetrics: an instance of the FontMetrics class

如果您使用的是页面文字，则可以访问以下内容模板变量：

If you're using page text you have access to the following template variables:

• {PAGE_NUM} ：当前页数


• {PAGE_COUNT} ：总页数

• {PAGE_NUM}: current page number
• {PAGE_COUNT}: total number of pages

注意：默认情况下，不支持解析嵌入式脚本或页面脚本。使用以下命令启用它： $ dompdf-> set_option（ isPhpEnabled，true）; 。必须在调用 $ dompdf-&r; render（）; 之前完成。

Note: Support for parsing embedded script or page scripts is disabled by default. Enable it with the following command: $dompdf->set_option("isPhpEnabled", true);. This must be done prior to calling $dompdf->render();.

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