Convert PNG to JPG and set transparent background to white with ImageMagick and PHP

Question

How can I use ImageMagick (with the php extension) to set the transparent background to white when converting an image from PNG to JPEG?

Answer 1

If you are using the Imagick extension:

setImageBackgroundColor(new ImagickPixel('white'));

// flattens multiple layers
$i = $i->flattenImages();

// the output format
$i->setImageFormat('jpg');

// save to disk
$i->writeImage('image.jpg');

// and/or output directly
// header('Content-Type: '.$i->getFormat());
// echo $i->getImageBlob();

// cleanup
$i->clear();
$i->destroy();