automatic image changing

[Richard26]

Hi, I would like for images to change automatically on my home page. I have been directed on the internet to the programmes rotate.php. but I cannot get it to work. So I have come here to seek help and guidance for me to get this to work. It would be great if this would work on my home page. Please can you help. Thanks Richard

[sallecpt]

it all depends how you want to do it.

Are you image filenames listed in a database? Do you want to display random images directly from a folder? Do you want to use javascript...?

Let us know

[sallecpt]

meant *ARE YOUR IMAGE FILENAMES....

[Richard26]

Hi, thanks for your reply. I would like to display random images directly from a folder. The folder is in my website folder and is called images. Inside are four images that i wish to use called image1.jpg, image2.jpg, image3.jpg and image4.jpg. Thanks Richard

So what code do you have so far? Show us your php.

[Richard26]

Hi, I googled rotate.php and found this example on http://www.marcofolio.net . Here is the code:

I tried to follow the instructions. I placed all this code in notepad and saved as rotate.php and placed this file in the same folder as my images folder. I left the folder setting as '.' I then changed the ext list to this

$extList = array();
$extList['jpg'] = 'image1/jpg';
$extList['jpg'] = 'image2/jpg';
$extList['jpg'] = 'image3/jpg';
$extList['jpg'] = 'image4/jpg';

the bit I was not sure about was point 4 and 5 in the instructions. In the body section of my homepage I then need to enter code to link to the rotate.php file in my images folder. I think this may be the problem. I am not sure what to put exactly prehaps <img src="http://example.com/rotate.php">. the website does not yet have an url as I have not uploaded it yet and so during creation just preview it in internet explorer or firefox. I would still expect it to work.

<?php

/*
    DOWNLOADED FROM [url]http://www.marcofolio.net/[/url]
    Check it out for more interesting scripts & downloads

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

    [url]http://www.hiveware.com/imagerotator.php[/url]

    [url]http://www.automaticlabs.com/[/url]


    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);
    }
}

?>