How to add watermarks to images using alpha channels in PHP using WAMP

Often we like to add a stamp or watermark in our images so no one can easily copy the images from our website.

Create a folder in www as “watermark” and create/upload three files.

  1. stamp.png (It can be with transapercy)
  2. picture.jpg (Any image JPG)
  3. index.php

<?php

// Load the stamp and the photo to apply the watermark to
$stamp = imagecreatefrompng(“E:/wamp64/www/watermark/stamp.png”);
$im = imagecreatefromjpeg(“E:/wamp64/www/watermark/picture.jpg”);

// Set the margins for the stamp and get the height/width of the stamp image
$marge_right = 10;
$marge_bottom = 10;
$sx = imagesx($stamp);
$sy = imagesy($stamp);

// Copy the stamp image onto our photo using the margin offsets and the photo
// width to calculate positioning of the stamp.
imagecopy($im, $stamp, imagesx($im) – $sx – $marge_right, imagesy($im) – $sy – $marge_bottom, 0, 0, imagesx($stamp), imagesy($stamp));

// Output and free memory
header(“Content-type: image/png”);
imagepng($im);
imagedestroy($im);
?>

 

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