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

php png gd
mmattax picture mmattax · Oct 7, 2009 · Viewed 70.6k times · Source

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

Yevgeniy Afanasyev picture Yevgeniy Afanasyev · Jun 30, 2015

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.

Related questions

Can PNG image transparency be preserved when using PHP's GDlib imagecopyresampled?

The following PHP code snippet uses GD to resize a browser-uploaded PNG to 128x128. It works great, except that the transparent areas in the original image are being replaced with a solid color- black in my case. Even though imagesavealpha …

Read More
How do I resize pngs with transparency in PHP?

I'm attempting to resize pngs with transparent backgrounds in PHP and the code samples I've found online don't work for me. Here's the code I'm using, advice will be much appreciated! $this->image = imagecreatefrompng($filename); imagesavealpha($this->image, …

Read More
Combine 2-3 transparent PNG images on top of each other with PHP

I am working on a custom avatar system for a project, but I have never really done much with the image side of PHP. I assume I need to use GD in some way, but I have no idea where …

Read More