Add watermark and resize image in PHP - php

Question

I need to add watermark on uploaded image and also resize it to make thumbnails and icons from that watermarked image. Below is my function code which is adding watermark but I can't find out how to resize image to given height and width:
function watermark_image_new($target, $wtrmrk_file, $newcopy, $extension, $w = 0, $h = 0) {
$watermark = imagecreatefrompng($wtrmrk_file);
imagealphablending($watermark, false);
imagesavealpha($watermark, true);
//resize code
if ($w != 0) {
list($width, $height) = getimagesize($target);
if ($extension == 'jpeg' || $extension == 'jpg') {
$img = imagecreatefromjpeg($target);
} else if ($extension == 'png') {
$img = imagecreatefrompng($target);
}
$dst = imagecreatetruecolor($newwidth, $newheight);
imagecopyresampled($dst, $img, 0, 0, 0, 0, $w, $h, $width, $height);
}
$img_w = imagesx($img);
$img_h = imagesy($img);
$wtrmrk_w = imagesx($watermark);
$wtrmrk_h = imagesy($watermark);
$dst_x = ($img_w / 2) - ($wtrmrk_w / 2); // For centering the watermark on any image
$dst_y = ($img_h / 2) - ($wtrmrk_h / 2); // For centering the watermark on any image
imagecopy($img, $watermark, $dst_x, $dst_y, 0, 0, $wtrmrk_w, $wtrmrk_h);
if ($extension == 'jpeg' || $extension == 'jpg') {
imagejpeg($img, $newcopy, 100);
} else if ($extension == 'png') {
imagepng($img, $newcopy);
}
imagedestroy($img);
imagedestroy($watermark);
}

Answer 1

A simple example to use Imagick for solve your case. To render Watermark and resize it and output the changed image
<?php
$image = new Imagick();
$image->readImage("/path/to/image.jpg");
$watermark = new Imagick();
$watermark->readImage("/path/to/watermark.png");
// how big are the images?
$iWidth = $image->getImageWidth();
$iHeight = $image->getImageHeight();
$wWidth = $watermark->getImageWidth();
$wHeight = $watermark->getImageHeight();
if ($iHeight < $wHeight || $iWidth < $wWidth) {
// resize the watermark
$watermark->scaleImage($iWidth, $iHeight);
// get new size
$wWidth = $watermark->getImageWidth();
$wHeight = $watermark->getImageHeight();
}
// calculate the position
$x = ($iWidth - $wWidth) / 2;
$y = ($iHeight - $wHeight) / 2;
$image->compositeImage($watermark, imagick::COMPOSITE_OVER, $x, $y);
header("Content-Type: image/" . $image->getImageFormat());
echo $image;