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Joey |
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THE LAZY MAN'S WAY
Open up notepad, and put in:
| CODE | <?php
/*
AUTOMATIC IMAGE ROTATOR Version 2.2 - December 4, 2003 Copyright (c) 2002-2003 Dan P. Benjamin, Automatic, Ltd. All Rights Reserved.
http://www.hiveware.com/imagerotator.php http://www.automaticlabs.com/ DISCLAIMER Automatic, Ltd. makes no representations or warranties about the suitability of the software, either express or implied, including but not limited to the implied warranties of merchantability, fitness for a particular purpose, or non-infringement. Dan P. Benjamin and Automatic, Ltd. shall not be liable for any damages suffered by licensee as a result of using, modifying or distributing this software or its derivatives. ABOUT This PHP script will randomly select an image file from a folder of images on your webserver. You can then link to it as you would any standard image file and you'll see a random image each time you reload. When you want to add or remove images from the rotation-pool, just add or remove them from the image rotation folder.
VERSION CHANGES Version 1.0 - Release version Version 1.5 - Tweaked a few boring bugs Version 2.0 - Complete rewrite from the ground-up - Made it clearer where to make modifications - Made it easier to specify/change the rotation-folder - Made it easier to specify/change supported image types - Wrote better instructions and info (you're them reading now) - Significant speed improvements - More error checking - Cleaner code (albeit more PHP-specific) - Better/faster random number generation and file-type parsing - Added a feature where the image to display can be specified - Added a cool feature where, if an error occurs (such as no images being found in the specified folder) *and* you're lucky enough to have the GD libraries compiled into PHP on your webserver, we generate a replacement "error image" on the fly. Version 2.1 - Updated a potential security flaw when value-matching filenames
Version 2.2 - Updated a few more potential security issues - Optimized the code a bit. - Expanded the doc for adding new mime/image types.
Thanks to faithful ALA reader Justin Greer for lots of good tips and solid code contribution!
INSTRUCTIONS 1. Modify the $folder setting in the configuration section below. 2. Add image types if needed (most users can ignore that part). 3. Upload this file (rotate.php) to your webserver. I recommend uploading it to the same folder as your images. 4. Link to the file as you would any normal image file, like this:
<img src="http://example.com/rotate.php">
5. You can also specify the image to display like this:
<img src="http://example.com/rotate.php?img=gorilla.jpg"> This would specify that an image named "gorilla.jpg" located in the image-rotation folder should be displayed. That's it, you're done.
*/
/* ------------------------- CONFIGURATION -----------------------
Set $folder to the full path to the location of your images. For example: $folder = '/user/me/example.com/images/'; If the rotate.php file will be in the same folder as your images then you should leave it set to $folder = '.';
*/
$folder = '.';
/*
Most users can safely ignore this part. If you're a programmer, keep reading, if not, you're done. Go get some coffee.
If you'd like to enable additional image types other than gif, jpg, and png, add a duplicate line to the section below for the new image type. Add the new file-type, single-quoted, inside brackets. Add the mime-type to be sent to the browser, also single-quoted, after the equal sign. For example: PDF Files:
$extList['pdf'] = 'application/pdf'; CSS Files:
$extList['css'] = 'text/css';
You can even serve up random HTML files:
$extList['html'] = 'text/html'; $extList['htm'] = 'text/html';
Just be sure your mime-type definition is correct!
*/
$extList = array(); $extList['gif'] = 'image/gif'; $extList['jpg'] = 'image/jpeg'; $extList['jpeg'] = 'image/jpeg'; $extList['png'] = 'image/png';
// You don't need to edit anything after this point.
// --------------------- END CONFIGURATION -----------------------
$img = null;
if (substr($folder,-1) != '/') { $folder = $folder.'/'; }
if (isset($_GET['img'])) { $imageInfo = pathinfo($_GET['img']); if ( isset( $extList[ strtolower( $imageInfo['extension'] ) ] ) && file_exists( $folder.$imageInfo['basename'] ) ) { $img = $folder.$imageInfo['basename']; } } else { $fileList = array(); $handle = opendir($folder); while ( false !== ( $file = readdir($handle) ) ) { $file_info = pathinfo($file); if ( isset( $extList[ strtolower( $file_info['extension'] ) ] ) ) { $fileList[] = $file; } } closedir($handle);
if (count($fileList) > 0) { $imageNumber = time() % count($fileList); $img = $folder.$fileList[$imageNumber]; } }
if ($img!=null) { $imageInfo = pathinfo($img); $contentType = 'Content-type: '.$extList[ $imageInfo['extension'] ]; header ($contentType); readfile($img); } else { if ( function_exists('imagecreate') ) { header ("Content-type: image/png"); $im = @imagecreate (100, 100) or die ("Cannot initialize new GD image stream"); $background_color = imagecolorallocate ($im, 255, 255, 255); $text_color = imagecolorallocate ($im, 0,0,0); imagestring ($im, 2, 5, 5, "IMAGE ERROR", $text_color); imagepng ($im); imagedestroy($im); } }
?>
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Save the file as rotator.php
Then, upload it to a folder on a web space of some kind.
Next, put the images you want to "rotate" and load on every refresh in the same folder, with nothing else.
Next, since you can't use BBcode to post .phps as images, you'll need to use dohtml, and <img src="http://YOURWEBSPACE.WHATEVER.COM/ROTATORFOLDER/rotator.php">
Every time you refresh the page, a random image (in that folder) will load in that spot.
This post has been edited by Joey on Oct 14 2006, 01:30 PM
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