Convert JPEG to a Progressive JPEG in PHP

Question

I\'m trying to re-save an already created JPEG as a progressive jpg.

Basically, on the front end I have some JS that crops an image, and outputs a base64 im

Answer 1

Create image resource with imagecreatefromstring:

$data = base64_decode($data);
$im = imagecreatefromstring($data);
if ($im === false) {
  die("imagecreatefromstring failed");
}
imageinterlace($im, true);
imagejpeg($im, 'new.jpg');
imagedestroy($im);