Solved

how to put text watermark on site images

Posted on 2011-09-11
7
376 Views
Last Modified: 2012-05-12
how to put text watermark on site images :

is there any class or something can do that ....

example :  (www.bokra.net) --> watermark

 2-20-2836-29.jpg
0
Comment
Question by:YUYU
  • 3
7 Comments
 

Expert Comment

by:PetrVitek
Comment Utility
Are you talking about adding them dynamically ? ( i guess )

2 options i think:

1) if you have hosting that allows you to run shell, you can use imagemagick utility.
2) if not you probably have to use GD library and change the images from php directly

All images need to be linked thrugh php ( no direct access to the images ) or yet better redirect the request to watermarked image automatically with .htaccess
.htaccess can check if the watermaked image is prepared ( file exists )
if yes - redirect directly to image
if not - redirect to php script that will create the watermarked image.

the php script will create new image combining the watermark image with the original, and saving it so it needs to be done only once.

example of creating the image - http://www.sitepoint.com/watermark-images-php/

I suggest you don't do it everytime image is requested, but save it, as the image manipulation through GD is really memory expensive.

0
 
LVL 108

Accepted Solution

by:
Ray Paseur earned 500 total points
Comment Utility
The watermark in the image above is not really "text."  It is a stylized image of a text string.  Here is how you do it.
http://www.laprbass.com/RAY_image_watermark.php

This script uses the images here:
http://www.LAPRBass.com/RAY_add_watermark_source_image.png
http://www.LAPRBass.com/RAY_add_watermark_watermark_image.png

HTH, ~Ray
<?php // RAY_image_watermark.php
error_reporting(E_ALL);

// LOCATION OF THE IMAGES (COULD COME IN FROM $_GET URL STRING)
$original = 'http://www.LAPRBass.com/RAY_add_watermark_source_image.png';
$h2o_mark = 'http://www.LAPRBass.com/RAY_add_watermark_watermark_image.png';

// READ THE IMAGE AND THE WATERMARK FILE
// MAN PAGE http://php.net/manual/en/function.imagecreatefrompng.php
$im = ImageCreateFromPNG($original);
$wm = ImageCreateFromPNG($h2o_mark);

// ADD WATERMARK USING LOCAL FUNCTION
imagelogo($im, $wm, imagesx($im), imagesy($im), imagesx($wm), imagesy($wm));

// SHOW THE IMAGE
header('Content-type: image/png');
ImagePNG($im);

// A FUNCTION TO ADD THE LOGO WATERMARK
// SEE http://php.net/manual/en/function.imagealphablending.php#77085
function imagelogo (&$dst_image, $src_image, $dst_w, $dst_h, $src_w, $src_h)
{
    ImageAlphaBlending($dst_image,TRUE);
    ImageAlphaBlending($src_image,TRUE);
    ImageCopy($dst_image, $src_image, ($dst_w-$src_w), ($dst_h-$src_h), 0, 0, $src_w, $src_h);
}

Open in new window

0
 

Author Comment

by:YUYU
Comment Utility
I've requested that this question be deleted for the following reason:

no benefit solution
0
 
LVL 108

Expert Comment

by:Ray Paseur
Comment Utility
I object to deleting this question.  This is a very well understood design pattern, used daily by thousands of sites around the world.  I posted a tested and working code example showing exactly how it is done.  I posted the test data, the complete code, and a link to the script so you can see it in action.  It's all there and it works.  If you have some kind of misunderstanding of the solution I posted, please give us your comments or at least try to work with us instead of just deleting the question.  Thanks, ~Ray
0
 
LVL 108

Expert Comment

by:Ray Paseur
Comment Utility
Recommend accept http:#36521673 -- that is how it is done in the real world by the professionals.
0

Featured Post

Highfive Gives IT Their Time Back

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

Things That Drive Us Nuts Have you noticed the use of the reCaptcha feature at EE and other web sites?  It wants you to read and retype something that looks like this.Insanity!  It's not EE's fault - that's just the way reCaptcha works.  But it is …
Since pre-biblical times, humans have sought ways to keep secrets, and share the secrets selectively.  This article explores the ways PHP can be used to hide and encrypt information.
The viewer will learn how to count occurrences of each item in an array.
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now