Cakephp TCPDF 错误：TCPDF 错误：某些数据已输出，无法发送 PDF 文件

发布于 2024-11-29 05:49:27 字数 663 浏览 2 评论 0原文

我已按照以下链接中的说明安装了 TCPDF： http://bakery .cakephp.org/articles/kalileo/2010/06/08/creating-pdf-files-with-cakephp-and-tcpdf

但是当我把这个通过控制器，我收到以下错误： TCPDF 错误：某些数据已输出，无法发送 PDF 文件

我似乎无法弄清楚原因。我尝试搜索视图文件以确保任何 PHP 标签之前没有空格。我别无选择...

有什么我可以检查的吗？

我想我知道错误来自哪里。以下是 tcpdf.php 中输出错误的代码：

case 'D': {
                // download PDF as file
                if (ob_get_contents()) {
                    $this->Error('Some data has already been output, can\'t send PDF file');
                }

原文

I have installed TCPDF following instructions on below link:
http://bakery.cakephp.org/articles/kalileo/2010/06/08/creating-pdf-files-with-cakephp-and-tcpdf

However when I put this through controller, I am getting below error:
TCPDF ERROR: Some data has already been output, can't send PDF file

I cannot seem to figure out why. I've tried search through view files to ensure there are no spaces before any PHP tags. I'm out of choices...

Is there anything that I could check?

I think I know where the error is coming from. Below is the code for where the error is getting outputted in tcpdf.php:

case 'D': {
                // download PDF as file
                if (ob_get_contents()) {
                    $this->Error('Some data has already been output, can\'t send PDF file');
                }

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缱倦旧时光 2024-12-06 05:49:27

你只需在 switch 语句上方添加 ob_end_clean() 即可。它会清除标头

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枉心 2024-12-06 05:49:27

尝试使用 ob_clean() 清理输出缓冲区

或

在输出 PDF 内容之前避免打印空格或任何变量

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GRAY°灰色天空 2024-12-06 05:49:27

删除该行

require_once('tcpdf/config/lang/eng.php');

如果您添加了该行，也请从代码中

。 PS 如果我将 ob_clean() 放在 Output 公共函数的最后 2 行中，如 rajapandian 和 Kamil Ilyas 所提到的，它对我来说效果很好：

public function Output($name='doc.pdf', $dest='I') {
    //LOTS OF CODE HERE....}
    }
           ob_end_clean(); //add this line here 
    return '';
}

Also remove the line

require_once('tcpdf/config/lang/eng.php');

from your code if you added it in.

P.S. The ob_clean() works well for me if I put it in the 2nd last line of the Output public function as mentioned by rajapandian and Kamil Ilyas:

public function Output($name='doc.pdf', $dest='I') {
    //LOTS OF CODE HERE....}
    }
           ob_end_clean(); //add this line here 
    return '';
}

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