This is a simple example. Please look at the full composite tutorial for more examples.

Image
This is a simple example. Please look at the full composite tutorial for more examples.
function compositeImage()
{
    $img1 = new \Imagick();
    $img1->readImage(realpath("images/Biter_500.jpg"));

    $img2 = new \Imagick();
    $img2->readImage(realpath("images/Skyline_400.jpg"));

    $img1->resizeimage(
        $img2->getImageWidth(),
        $img2->getImageHeight(),
        \Imagick::FILTER_LANCZOS,
        1
    );

    $opacity = new \Imagick();
    $opacity->newPseudoImage(
        $img1->getImageHeight(),
        $img1->getImageWidth(),
        "gradient:gray(10%)-gray(90%)"
    );
    $opacity->rotateimage('black', 90);

    $img2->compositeImage($opacity, \Imagick::COMPOSITE_COPYOPACITY, 0, 0);
    $img1->compositeImage($img2, \Imagick::COMPOSITE_ATOP, 0, 0);

    header("Content-Type: image/jpg");
    echo $img1->getImageBlob();
}