I have an upload Api that as a response object delivers (along with other stuff inside a Json object) a base64 encoded jpeg image.
I create the encoded image as so:
$im; // gd image resource
ob_start();
imagejpeg($im);
$data = base64_encode(ob_get_clean());
The data then is put inside a form field using javascript and submitted.
How can I create a GD resource from that again so that I actually can save that image as a file?
Everything in PHP.
You can use imagecreatefromstring() function:
$data = base64_decode($_POST['image_as_base64']);
$formImage = imagecreatefromstring($data);
"String" does not mean a "real" string. In that case it means bytes/blob data.
How can I create a GD resource from that again so that I actually can save that image as a file?
Are you sure you need to do that extra step? How about:
file_put_contents('MyFile.jpg', base64_decode($_POST['MyFormField']));
I did by this way:
// input is in format: data:image/png;base64,...
$str="data:image/png;base64,";
$data=str_replace($str,"",$_POST['image']);
$data = base64_decode($data);
file_put_contents('tmp/'.mktime().'.png', $data);