Water mark an image

Copy and paste the following code into your editor and run it (code comments are included).
If you want to see the live result, try it here (new window).

This example takes a local image and displays a water mark on it.

The source code:
<html> <body> <h1>Water Marking an image</h1> <p> Here is the original image: <a href="resized-orig_image.jpg" target="_blank">Image to resize</a> </p> <? //Original jpeg image $filename='resized-orig_image.jpg'; $array = getimagesize($filename); $width_orig= $array[0]; $height_orig= $array[1]; $image = imagecreatefromjpeg($filename); $watermark = imagecreatefromgif('watermark.gif'); //another way to obtain the size of an image: $water_width = imagesx($watermark); $water_height = imagesy($watermark); $image_water = imagecreatetruecolor($water_width,$water_height); //The water mark is affixed in the middle of the original image $posx=$width_orig/2.0 - $water_width/2.0; $posy=$height_orig/2.0 - $water_height/2.0; imagecopymerge($image,$watermark,$posx,$posy,0,0,$water_width,$water_height,100); //Output into another file - 50 is a percentage of the original quality imagejpeg($image,'merged-'.$filename, 100); ?> <p>Here is the merged one: <a href="merged-resized-orig_image.jpg" target="_blank">Merged Image</a></p> </body> </html>

Notes:
- there are some functions which require the GD 2.0.1 library or later (2.0.28 or later is recommended);
- you need to have the necessary permissions to be able to write a file on your server (see chmod on linux/unix);
- try this if you wish to verify the GD version: var_dump(gd_info());

You may wish to read additional materials from:
- http://us.php.net/getimagesize
- function.imagecreatetruecolor.php
- function.imagecreatefromjpeg.php
- function.imagecreatefromgif.php
- function.imagecopyresampled.php
- function.imagejpeg.php
- function.imagegif.php
- function.imagecopymerge.php
- function.imagedestroy.php

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Water mark an image

Water mark an image

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