Fabric.js canvas.toDataURL() sent to PHP by Ajax

Question

I have a problem here when I need create a image with transparent background. I still don´t know if the problem is with fabricjs or with php. Everything works fine when I sent a

Answer 1

The last step is quite the opposite:

imagecopyresampled( $img, $alpha_image, 0, 0, 0, 0, $w, $h, $w, $h );

And voila! The image is transparent!