TCPDF 并插入 base64 编码的图像 [英] TCPDF and insert an image base64 encoded

问题描述

我从 Mysql db 得到这个字符串:

I've this string from Mysql db:

$img_base64_encoded = 

'data:image/svg+xml;base64,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'

它在图像中显示HI".现在我想将此图像直接嵌入使用 TCPDF 插件生成的 PDF 中，但总是出错:

It show "HI" in a image. Now i want to embed this image encoded directly inside a PDF generated with TCPDF plugin but always get error:

TCPDF ERROR: [Image] Unable to get the size of the image: 

这是如何插入它:

$img = '<img src="' . $img_base64_encoded . '">';
$pdf->writeHTML($img, true, false, true, false, '');

我也试过:

  $pdf->Image('@' . $img_base64_encoded);

同样的错误.

推荐答案

你不能在 src 中使用 base64 流，而是先将流保存到文件然后使用它

You cannot use base64 stream in src rather first save the stream to a file then use it

$img_base64_encoded = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAA0gA...';
$imageContent = file_get_contents($img_base64_encoded);
$path = tempnam(sys_get_temp_dir(), 'prefix');

file_put_contents ($path, $imageContent);

$img = '<img src="' . $path . '">';
$pdf->writeHTML($img, true, false, true, false, '');

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