Change image in PDF - php

Question

Hi I keep getting this error:
Runtime Deprecated code usage - Imagick::clone method is deprecated and it's use should be avoided
It is always around this function:
protected function ImagePngAlpha($file, $x, $y, $wpx, $hpx, $w, $h, $type, $link, $align, $resize, $dpi, $palign, $filehash='') {
if (empty($filehash)) {
$filehash = md5($file);
}
// create temp image file (without alpha channel)
$tempfile_plain = K_PATH_CACHE.'mskp_'.$filehash;
// create temp alpha file
$tempfile_alpha = K_PATH_CACHE.'mska_'.$filehash;
if (extension_loaded('imagick')) { // ImageMagick
// ImageMagick library
$img = new Imagick();
$img->readImage($file);
// clone image object
$imga = $img->clone();
// extract alpha channel
$img->separateImageChannel(8); // 8 = (imagick::CHANNEL_ALPHA | imagick::CHANNEL_OPACITY | imagick::CHANNEL_MATTE);
$img->negateImage(true);
$img->setImageFormat('png');
$img->writeImage($tempfile_alpha);
// remove alpha channel
$imga->separateImageChannel(39); // 39 = (imagick::CHANNEL_ALL & ~(imagick::CHANNEL_ALPHA | imagick::CHANNEL_OPACITY | imagick::CHANNEL_MATTE));
$imga->setImageFormat('png');
$imga->writeImage($tempfile_plain);
} else { // GD library
// generate images
$img = imagecreatefrompng($file);
$imgalpha = imagecreate($wpx, $hpx);
// generate gray scale palette (0 -> 255)
for ($c = 0; $c < 256; ++$c) {
ImageColorAllocate($imgalpha, $c, $c, $c);
}
// extract alpha channel
for ($xpx = 0; $xpx < $wpx; ++$xpx) {
for ($ypx = 0; $ypx < $hpx; ++$ypx) {
$color = imagecolorat($img, $xpx, $ypx);
$alpha = ($color >> 24); // shifts off the first 24 bits (where 8x3 are used for each color), and returns the remaining 7 allocated bits (commonly used for alpha)
$alpha = (((127 - $alpha) / 127) * 255); // GD alpha is only 7 bit (0 -> 127)
$alpha = $this->getGDgamma($alpha); // correct gamma
imagesetpixel($imgalpha, $xpx, $ypx, $alpha);
}
}
imagepng($imgalpha, $tempfile_alpha);
imagedestroy($imgalpha);
// extract image without alpha channel
$imgplain = imagecreatetruecolor($wpx, $hpx);
imagecopy($imgplain, $img, 0, 0, 0, 0, $wpx, $hpx);
imagepng($imgplain, $tempfile_plain);
imagedestroy($imgplain);
}
// embed mask image
$imgmask = $this->Image($tempfile_alpha, $x, $y, $w, $h, 'PNG', '', '', $resize, $dpi, '', true, false);
// embed image, masked with previously embedded mask
$this->Image($tempfile_plain, $x, $y, $w, $h, $type, $link, $align, $resize, $dpi, $palign, false, $imgmask);
// remove temp files
unlink($tempfile_alpha);
unlink($tempfile_plain);
}
All I was trying to do is change the image inside the PDF, but for some reason it won't allow me. I tried looking online but I could not find the same issue. Can anyone help please?

Answer 1

As explained in the Imagick::clone documentation, this method is indeed deprecated, and to be replace by an object cloning.
Replace the line $imga = $img->clone(); by $imga = clone $img;