How to create a watermark on image using PHP?

Creating a watermark on image using imagecopy function by the PHP

imagecopy ( resource $dst_im , resource $src_im , int $dst_x , int $dst_y , int $src_x , int $src_y , int $src_w , int $src_h )

dst_im

Destination image link resource.

src_im

Source image link resource.

dst_x

x-coordinate of destination point.

dst_y

y-coordinate of destination point.

src_x

x-coordinate of source point.

src_y

y-coordinate of source point.

src_w

Source width.

src_h

Source height.

Sample Code:

<?php
// Load the stamp and the photo to apply the watermark to
//watermark image that you want to see on top of the other image
//image format can be jpeg,png,gif but png is recomnded
$stamp = imagecreatefrompng('stamp.png');
//Base image
$im = imagecreatefromjpeg('test.jpeg');

// Set the margins for the stamp and get the height/width of the stamp image
$marge_left = 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 - $marge_left, imagesy($im) - $sy - $marge_bottom, 0, 0, imagesx($stamp), imagesy($stamp));

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

Images used:

Result: