looks pretty good…

So, the second tip worked out quickly. Thank you. In regards to the first issue, yes, we can probably just filter the photo. Makes sense. Good idea, thanks.

I seriously appreciate this plugin and tutorial. Have a good one.

Unfortunately, there is currently no way you can grab any other image than the post’s thumbnail. Using the plugin that is.
If you examine the function get_the_post_thumbnail() in the file wp-includes/post-thumbnail-template.php you will see there is a filter executing when returning the html of the image. You can hook a function on that ‘post_thumbnail_html’ filter, and have it return the html of your custom field images (the html string will be empty in your case anyway, since you don’t use featured images). In that hooked function, you could also use something like this function to get your first image. I’m not sure it will work though, as it will depend on when and how the things are run, i.e. your custom fields may be included in your content later than the hook, or not included in the content at all).

For your second question, the editor may have stripped whatever you wrote in the <code> block, so I don’t know to what exactly you are referring to. I’ll assume you use the function call of the plugin though, and not the shortcode.
You can have the function return the related articles instead of echoing them, (see first parameter of cptr() in the documentation) into a variable, and test if empty. The function returns an unordered list of posts only if one or more are related. Otherwise it returns an empty string.
So you could do something like:

$related = cptr(false);
if( !empty( $related ) )
{
echo "<h2>Similar</h2>";
echo $related;
}


Hope this helps.

This plugin works great. It’s very easy to associate custom post types with others cpt’s; it’s pretty much self-explanatory. It’s great when plugins are simple and work as they should. Thank you.

Question: I’m not using Featured Images, but instead meta boxes to upload images, and consequently, haven’t been able to show the thumbnails per related post. Is there a way to display the first photo of a cpt instead of the featured photo?

Also, is it possible to display the word “Similar” before the list of related posts/cpt’s? I know I can add it before the , but I don’t want it to appear when there aren’t related posts. So, I want it to be included in the php. Could you please provide a tip on how to achieve this?

Thanks again for your plugin and tips. I’ve been wanting something like this for a long time.

Setting the default order is a good idea, and I’ll try to implement it in the next version. You’ll be able to change it from within the settings page.

Now, about the 500 posts limit you are mentioning, there isn’t such a thing. The limits that are implemented are 10, 50, 100 and “All”. Make sure you have updated to the latest version.