Array Help

This forum is now closed as part of retiring phpBB2.
Forum rules
READ: Board-Wide Rules and Regulations

This forum is now closed due to phpBB2.0 being retired.
Post Reply
Registered User
Posts: 18
Joined: Tue May 27, 2008 7:03 am

Array Help

Post by Litterbox » Mon Jun 23, 2008 6:44 am

I'm trying to make an array that will randomly generate banners for my site. I'm eventually going to be incorperating these banners into my forums theme once I've got things fleshed out, but I'm having trouble.

However, the array fails to display any images if the array is looking for something not in the root. Here's an example:

Code: Select all

$sites = array(
"<a href='test1.php'><img src='modules/ads/1.gif' border='0'></a>",
"<a href='test2.php'><img src='modules/ads/2.gif' border='0'></a>",
"<a href='test3.php'><img src='modules/ads/3.gif' border='0'></a>",
"<a href='test4.php'><img src='modules/ads/4.gif' border='0'></a>",
"<a href='test5.php'><img src='modules/ads/5.gif' border='0'></a>");
$random = $sites[array_rand($sites)];
echo "" . $random;
When I save this, and look at the page, I see nothing. Though viewing the source code shows the tags I placed, seemingly working.

I imagine what I'm doing wrong is simple, so any help would be appreciated, thanks.

User avatar
Former Team Member
Posts: 22908
Joined: Tue Feb 06, 2007 12:33 am
Location: Melbourne, Australia
Name: Ric

Re: Array Help

Post by ric323 » Mon Jun 23, 2008 6:57 am

--moved from "Support" to "MOD Writers Discussion"

You may get some more ideas from:

or this (I've posted the code, as the links inside the code no longer work)

Code: Select all



	Version 2.2 - December 4, 2003
	Copyright (c) 2002-2003 Dan P. Benjamin, Automatic, Ltd.
	All Rights Reserved.
	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.
	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 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

    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!

	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="">

	5. You can also specify the image to display like this:

			<img src="">
		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/';
	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;

	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);
} 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);

The Knowledge Base contains solutions to many common problems!
How to fix "Doesn't have a default value" and "Incorrect string value: xxx for column 'post_text' " errors.
How to do a clean re-install of the latest phpBB3 version.
Problems with permissions? Read phpBB3 Permissions

User avatar
Registered User
Posts: 11716
Joined: Mon Apr 04, 2005 11:09 pm
Location: Milano - Frankfurt
Name: Marco

Re: Array Help

Post by 3Di » Mon Jun 23, 2008 2:10 pm

If your site isn't using the phpBB standards you better to search over the PHP related sites or venues, instead the phpbb core code allows you to get in touch with the amazing var: $phpbb_root_path. ;)
Want to compensate me for my interest? Donate
Please PM me only to request paid works. Thx.
Extensions, Scripts, MOD porting, Update/Upgrades

Post Reply

Return to “[2.0.x] MOD Writers Discussion”

Who is online

Users browsing this forum: No registered users and 5 guests