Question

does anyone know how to apply fade effect to an image using PHP ? what I am looking for is a way to apply gradient transparency ( i mean : at the top , the image is opaque , which gradually gets more and more transparent , and at the bottom it is completely transparent).

i have been reading up on http://php.net/manual/en/function.imagecolortransparent.php , but did not see anything about applying a gradient effect to an image.

i also read : PHP – Generate transparency (or opacity) gradient using image , but it kinda trailed off without any solution!

I am also open to any other suggestion / libraries that can do this from command line.

Answer 1

Obviously you’ll need to work with a png for this effect, but you can convert any png into a jpg using php. The following question I believe covers what you are asking about. Part of the code will have to be removed to clear the image reflection effect.

Can You Get a Transparent Gradient using PHP ImageMagick?

The piece of code which seems to do what you are trying to accomplish is:

$im = new Imagick('image.jpg'); //Reference image location

if (!$im->getImageAlphaChannel()) {
    $im->setImageAlphaChannel(Imagick::ALPHACHANNEL_SET);
}

$refl = $im->clone();
$refl->flipImage();

$gradient = new Imagick();

$gradient->newPseudoImage($refl->getImageWidth() + 10, $refl->getImageHeight() + 10, "gradient:transparent-black");