I have a base64 encoded png, how do I write the image to a file in PHP?

Question

What's the proper way in PHP to create an image file (PNG), when I have the base64 encoding?

I've been playing around with:

  file_put_contents('/tmp/'. $_REQUEST['id'].'.png', $_REQUEST['data']);  

do I need to decode? should I be using the gd library?

Answer 1

You need to use base64_decode(). AND. Sometimes it is not sufficient. Here is all code that you need:

$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.

Answer 2

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 :).