Take the 2-minute tour ×
WordPress Development Stack Exchange is a question and answer site for WordPress developers and administrators. It's 100% free, no registration required.

I'd like to have my header banner change every day, chosen (e.g. randomly) from a list/folder of images.

So far I only found plugins that select a random banner per post or per page view, neither is what I want. Do you know of a plugin, or any other way?

Edit: Example. I'm adding a folder to my wordpress installation. This folder contains some header images. Every 24 hours, an random image is chosen from this folder and becomes the header image for 24 hours, until another random image is chosen.

Actually, I don't care how exactly the image is chosen - I'm fine with rotating through all images in the folder as well. The only thing I care about is that the chosen image stays there for 24 hours.

Basically it's the same as if I were picking a new header image manually every day.

share|improve this question
1  
So do you want 1) a different image each day, or 2) a different and random image each day? A different as well as random image each day is somewhat of a contradiction. –  songdogtech Dec 12 '10 at 22:06
    
@song: A random image. –  mafutrct Dec 13 '10 at 10:28
    
See answer below. –  songdogtech Dec 13 '10 at 13:18
    
Btw, just to make sure, I'm talking about self-hosted. –  mafutrct Dec 29 '10 at 21:55
    
@songdogtech Oops, I completely misunderstood - I actually meant the opposite, your option 1. Sorry! –  mafutrct Dec 29 '10 at 21:57

5 Answers 5

up vote 1 down vote accepted
 <div id="header">
    <?php
        mt_srand((int)date('z'));
        $headers=glob(PATH_TO_FILES .'/*.jpg');

        $header=mt_rand(0,count($headers)-1  );
        ?>
            <img id="header-image"  `src="<?php echo URL_TO_FILES . '/'.basename($headers[$header]);  ?>" alt="header" />




 </div>

replace your current header with this. I will of course help you implement this further if you need help. (or if you need the code explained)

share|improve this answer
    
Actually I'd be glad if you could expand on this a little. I'm not familiar with the PHP functions you used, and I'm also not certain how I "replace the current header". –  mafutrct Dec 29 '10 at 21:54
    
The code does the following: it scans a directory searching for all jpg files ($headers=glob(PATH_TO_FILES .'/*.jpg');). It creates a random number (based on the day in the year), which is in the range between 0 and how many files it found. Then it displays the randomly selected file as an image. As for how you replace the current header, you'll have to search your current theme for the code that generates the header image (probably in header.php).Be careful that PATH_TO_FILES has to be a local address, telling where the files are on the server.URL_TO_FILES is the "internet link" to the dir. –  Cronco Dec 30 '10 at 1:25

If you can't code, sorry no.

If you can code, look at which hook these plugins are using, and create a new plugin accordingly.

share|improve this answer

See http://www.alistapart.com/articles/betterrotator/ I use it myself on a few sites.

share|improve this answer
    
It looks like this changes per page reload instead of per day? I was probably unclear in my description - I meant to have the image change once a day. –  mafutrct Dec 29 '10 at 21:51
    
<clarity>You're still unclear.</clarity> You want the image to change once a day, but also be a random image? And what time is the change? At midnight? Or do you want a monday.jpg, tuesday,jpg, etc, image change? –  songdogtech Dec 29 '10 at 23:14

You can take a look in this Javascript example, it's very easy to implement it in your theme.

share|improve this answer
    
I'd prefer to have it server-side only. –  mafutrct Dec 29 '10 at 21:50

Based on Cronco's answer and a lot of experimentation (I'm neither familiar with PHP nor with the inner workings of wordpress itself) and some cleanup, I found a solution that perfectly satisfies my needs.

Using the theme TwentyTen, I edited its header.php like this:

<?php
    // Check if this is a post or page, if it has a thumbnail, and if it's a big one
    if ( is_singular() &&
            has_post_thumbnail( $post->ID ) &&
            ( /* $src, $width, $height */ $image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'post-thumbnail' ) ) &&
            $image[1] >= HEADER_IMAGE_WIDTH ) :
        // Houston, we have a new header image!
        echo get_the_post_thumbnail( $post->ID, 'post-thumbnail' );
    else : ?>

        <!-- patch mafu begin -->
        <?php
        $headers = glob( get_template_directory() . '/banners/*.jpg' );
        $header = (int)date('z') % count($headers);
        ?>
        <img src="<?php echo get_template_directory_uri() . '/banners/' . basename($headers[$header]); ?>" width="<?php echo HEADER_IMAGE_WIDTH; ?>" height="<?php echo HEADER_IMAGE_HEIGHT; ?>" alt="" />
        <!-- patch mafu end -->

    <?php endif; ?>

If no specific image is set for the displayed page (this is specific to this theme), then a header image is chosen based on the current day from all jpg images in the theme_directory/banners folder, which has to be created.

I tried to randomize the image order more, but apparently this is not possible in an easy way, so I went with fixed order.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.