我有一个 base64 编码的 png，如何将图像写入 PHP 中的文件？
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I have a base64 encoded png, how do I write the image to a file in PHP?
提问by mmattax
What's the proper way in PHP to create an image file (PNG), when I have the base64 encoding?
当我使用 base64 编码时，在 PHP 中创建图像文件 (PNG) 的正确方法是什么？
I've been playing around with:
我一直在玩：
file_put_contents('/tmp/'. $_REQUEST['id'].'.png', $_REQUEST['data']);
do I need to decode? should I be using the gd library?
我需要解码吗？我应该使用 gd 库吗？
采纳答案by Thibault Martin-Lagardette
My best guess is that you simply need to call base64_decode()on $_REQUEST['data']before writing it to the file. That should be plenty enough :).
我最好的猜测是，你只需要调用base64_decode()就$_REQUEST['data']其写入文件之前。那应该足够了:)。
回答by Yevgeniy Afanasyev
You need to use base64_decode(). AND. Sometimes it is not sufficient. Here is all code that you need:
您需要使用 base64_decode()。和。有时这还不够。这是您需要的所有代码：
$img = $_POST['data'];
$img = str_replace('data:image/png;base64,', '', $img);
$img = str_replace(' ', '+', $img);
$fileData = base64_decode($img);
//saving
$fileName = 'photo.png';
file_put_contents($fileName, $fileData);
P.S. I used this code to get PNG image from html canvas.
PS我使用此代码从html画布获取PNG图像。
回答by Chris Kloberdanz
I would think you'd want to decode with base64_decode()unless you are only using it like they are here HERE.
我想你会想用base64_decode()解码，除非你只是像他们在这里一样使用它。
The thing I am sure of is that you will want to sanitize $_REQUEST['id'] before using it.
我可以肯定的是，您需要在使用 $_REQUEST['id'] 之前对其进行清理。
