如何在 PHP/HTML 中将 base64 字符串 (gif) 解码为图像

How to decode a base64 string (gif) into image in PHP / HTML

提问by integral007

I have a base64 encoded string that I would like to convert into an image in PHP / HTML.

我有一个 base64 编码的字符串，我想将其转换为 PHP/HTML 中的图像。

Here is what I have:

这是我所拥有的：

$data = "R0lGODdhAAGAAKIAAP38+/3h3cjN5P3HwgAAAP8AoP8AGv8EIywAAAAAAAGAAAAD.....";
echo base64_decode($data);

// OR

// 或者

echo '<img src="data:image/gif;base64,' . base64_decode($data) . '" />';

None of those work. Any suggestions?

这些都不起作用。有什么建议？

Much appreciated! Catalin

非常感激！卡特琳

回答by Emil H

In the first case you should add this before echoing the decoded image data:

在第一种情况下，您应该在回显解码的图像数据之前添加它：

header("Content-type: image/gif");

In the second case, use this instead:

在第二种情况下，请改用它：

echo '<img src="data:image/gif;base64,' . $data . '" />';

回答by Peter C

echo '<img src="data:image/gif;base64,' . $data . '" />'

Should do the trick.

应该做的伎俩。

回答by Paulo Capelo

Stupid question: is the mime-type correct?? is your base64 code represent a gif file????

愚蠢的问题：mime 类型是否正确？你的 base64 代码是一个 gif 文件吗？？？？

this is an example using a image/png, without php, just html, and it works:

这是一个使用图像/png 的示例，没有 php，只有 html，它可以工作：

<img alt="Embedded Image" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEEAAABBCAIAAAABlV4SAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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Just try it.

就试一试吧。

Now, the same base64 code using the php exemplified above but using the proper mime-type (image/png):

现在，使用上面示例的 php 的相同 base64 代码但使用正确的 mime 类型（图像/png）：

<?php

echo "<img alt=Embedded Image src=\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEEAAABBCAIAAAABlV4SAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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?>

So, this is the code:

所以，这是代码：

echo "<img alt=Embedded Image src=\"data:image/png;base64,[BASE64CODE]\" />";

Notice, since I am using double quotes for the echo tag, I have to tell php to ignore the ones inside the img tag. Other than that, you are good

注意，因为我对 echo 标签使用双引号，所以我必须告诉 php 忽略 img 标签内的那些。除此之外，你很好

cheers

干杯

PC

个人电脑

回答by Milind Morey

Display Image using base64_encode function

使用 base64_encode 函数显示图像

$ret = fopen($fullurl, 'r', true, $context);
$contents = stream_get_contents($ret);
$base64 = 'data:image/PNG;base64,' . base64_encode($contents);
echo "<img src=$base64 />" ;

回答by greg0ire

You have to use the header()function before echoing your data to specify the content type (gif image). Otherwise browsers will interpret it as html.

您必须header()在回显数据之前使用该函数来指定内容类型（gif 图像）。否则浏览器会将其解释为 html。