PHP random image

Question

Hello everyone,
Im trying to use (for the first time) random images generated
by PHP. I
installed a Technorama extension and then followed thru the
steps to place a
random image in the page, but there is nothing there when I
browse the page.
Please forgive my ignorance, but I have never done any php
stuff before.
And yes, the files are uploaded to my server. (which does
have php enabled).
The practice page I am using is
www.fionahayward.com/interiordesign/practice.php
I have the effect working with javascript on this page
www.fionahayward.com/interiordesign but am trying to use php
incase people
have javascript turned off.
Maybe its something to do with how Ive set up Server
Behaviours or something
(only guessing)
Thanks for listening
Fiona

Answer 1

1) create a php file named rotate.php in the folder where the
images are.
2) paste this code (between the [code ] and [/code]
markers... into that file and save it.
[code]
<?php
$folder = '.';
$extList = array();
$extList['gif'] = 'image/gif';
$extList['jpg'] = 'image/jpeg';
$extList['jpeg'] = 'image/jpeg';
$extList['png'] = 'image/png';
// --------------------- 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);
?>
[/code]
4) in whichever file you want the random images to appear,
reference the image so:
src="path/to/that/image/folder/rotate.php"
I tend to use root-relative pathing, but that part is up to
you.
NOTE: I've found that random image references are quirky in
IE browsers - they seem to want the image width and height to
display images that are dynamically selected... I've used this
script to display images that are all the same size and groups that
aren't. When the image size is unknown, I use width:100%
height:100% in my css)
email me if you have any issues with using the script. I use
it a lot with WordPress sites, but it isn't a WP only solution.
syncbox AT gmail DOT com (do the obvious)
HTH