Multiple images for different categories

Hi Jess,

Yes, its possible. there is a example in the FAQ. You can put the code in the theme’s functions.php or in a new/separate plugin.

I’m not near a computer to provide a full example. If you need more help let me know and I’ll help tomorrow.

Jan-Willem

Hello Jan,

Thanks for the reply.

I have tried it, but it only shows one photo in a category. Is it possible to have a set of random photos for each category?

Like 5 different dog photos for the “dog” category and 5 different cat photos for the “cat” category.

I have tried to use it with your random featured image additional plugin, but I think it’s not compatible.

Hi jess,

The following code should help. It allows you to set different images per category.

add_filter( 'dfi_thumbnail_id', 'dfi_category_random', 10, 2 );
function dfi_category_random( $dfi_id, $post_id ) {
    // Set a different image for posts that have the 'cats' category set.
    if ( has_category( 'cats', $post_id ) ) {
        $random_cats = array(
            7,
            8,
        );
        return $random_cats[ array_rand( $random_cats ) ]
    }
    // Set a different image for posts that have the 'dogs' category set.
    if ( has_category( 'dogs', $post_id ) ) {
        $random_dogs = array(
            10,
            14,
        );
        return $random_dogs[ array_rand( $random_dogs ) ]
    }

    return $dfi_id; // the original featured image id.
}

Let me know how it goes.

Jan-Willem

Hi Jan,

I tried creating a new plugin, but it says, “Plugin could not be activated because it triggered a fatal error.” every time I activate it.

Yes sorry there is a syntax error, that’s what you get when doing it in a hurry..
The code below has the missing ;

add_filter( 'dfi_thumbnail_id', 'dfi_category_random', 10, 2 );
function dfi_category_random( $dfi_id, $post_id ) {
    // Set a different image for posts that have the 'cats' category set.
    if ( has_category( 'cats', $post_id ) ) {
        $random_cats = array(
            7,
            8,
        );
        return $random_cats[ array_rand( $random_cats ) ];
    }
    // Set a different image for posts that have the 'dogs' category set.
    if ( has_category( 'dogs', $post_id ) ) {
        $random_dogs = array(
            10,
            14,
        );
        return $random_dogs[ array_rand( $random_dogs ) ];
    }

    return $dfi_id; // the original featured image id.
}

It’s working now.

Thanks, Jan, for your help; I really do appreciate it!