Creating GIF imagesPHP ManualPrevNextChapter 15. Creating GIF images
PHP is not limited to creating just HTML output. It can also be
used to create GIF image files, or even more convenient GIF image
streams. You will need to compile PHP with the GD library of
image functions for this to work.
Example 15-1. GIF creation with PHP 1
2 <?php
3 Header("Content-type: image/gif");
4 $string=implode($argv," ");
5 $im = imagecreatefromgif("images/button1.gif");
6 $orange = ImageColorAllocate($im, 220, 210, 60);
7 $px = (imagesx($im)-7.5*strlen($string))/2;
8 ImageString($im,3,$px,9,$string,$orange);
9 ImageGif($im);
10 ImageDestroy($im);
11 ?>
12
This example would be called from a page with a tag like: <img
src="button.php3?text"> The above button.php3 script
then takes this "text" string an overlays it on top of a
base image which in this case is "images/button1.gif"
and outputs the resulting image. This is a very convenient way to
avoid having to draw new button images every time you want to
change the text of a button. With this method they are
dynamically generated.
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