Zend Framework PDF问题 [英] Zend Framework PDF problems

问题描述

又是我，我有一个小问题:

It's me again guys, I have a small problem:

        // Create new PDF 
    $pdf = new Zend_Pdf(); 

    // Add new page to the document 
    $page = $pdf->newPage(Zend_Pdf_Page::SIZE_A4); 
    $pdf->pages[] = $page; 

    // Set font 
    $page->setFont(Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_HELVETICA), 20); 

    // Draw text 
    $page->drawText('Hello world!', 100, 510); 

    $this->getResponse()
         ->setHeader('Content-Disposition', 'attachment; filename=result.pdf')
         ->setHeader('Content-type', 'application/x-pdf');

    echo $pdf->render(); 

当我下载文件并尝试打开它时，出现错误，听起来像这样:

When I download the file, and try to open it, i'm getting an error, which sounds like this:

格式错误:没有PDF或已损坏

format error: not a PDF or corrupted

我的问题是:我做错了什么?

推荐答案

如果尝试使用文本编辑器(或十六进制编辑器)打开文件，会得到什么?

If you try to open the file with a text editor (or an hexadecimal editor), what do you get ?

您的PDF文件必须仅包含PDF数据，并且开头或结尾不得包含任何HTML或空白.

Your PDF file must contain only PDF data, and not any HTML or blank space at the beginning or the end.

可能引起麻烦的一件事是Zend Framework自动渲染View.
在操作开始时使用类似方法可能会有所帮助:

One thing that could cause troubles is the automatic rendering of a View by Zend Framework.
Using something like this at the beginning of your action might help :

$this->_helper->layout->disableLayout();
$this->_helper->viewRenderer->setNoRender();

我看了我写的某个动作示例，这是我看到的与您所做的唯一的区别，实际上...

I've looked at a sample I wrote sometime action, and it's the only difference I see with what you did, actually...

如果仍然无法使用，如果您尝试将PDF保存到文件中而不是将其发送给用户该怎么办?例如:

If it still doesn't work, what if you try saving the PDF to a file instead of sending it to the user ? With something like that, for instance :

$pdf->save(CACHE_DIR . '/test-pdf.pdf');

我知道这不是你想做的；但是它可以让您检查PDF是否生成正确，以确认问题是出在PDF生成还是在输出方面.

I know it's not what you want to do ; but it would allow you to check if the PDF is well-generated, to identify if the problem is with the PDF generation, or with it's output.

这是我正在谈论的完整示例:

And here is the full example I was talking about :

public function pdfAction()
{
    $this->_helper->layout->disableLayout();
    $this->_helper->viewRenderer->setNoRender();

    $pdf = new Zend_Pdf();
    $pdf->properties['Title'] = "TITLE";
    $pdf->properties['Author'] = "AUTHOR";

    $page = $pdf->newPage(Zend_Pdf_Page::SIZE_A4);
    $width  = $page->getWidth();        // A4 : 595
    $height = $page->getHeight();       // A4 : 842

    $imagePath = WEB_DIR . '/images/logo.png';
    $image = Zend_Pdf_Image::imageWithPath($imagePath);
    $x = 15;
    $y = $height - 15 - 106/2;
    $page->drawImage($image, $x, $y, $x+155/2, $y+106/2);

    $font = Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_HELVETICA);
    $page->setFont($font, 36);

    $page->drawText('Hello world!', 72, 720, 'UTF-8');

    $pdf->pages[] = $page;

    $this->getResponse()->setHeader('Content-type', 'application/x-pdf', true);
    $this->getResponse()->setHeader('Content-disposition', 'inline; filename=my-file.pdf', true);
    $this->getResponse()->setBody($pdf->render());
}

据我所记得，这在几个月前还不错；和您的代码的唯一区别是:

As far as I remember, this was working fine a couple of months ago ; and the only differences with your code are :

• 禁用布局/渲染
• 使用徽标；但这没什么大不同

希望这可以帮助 ;玩得开心！

Hope this helps ; Have fun!

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