Archive for June 2014

Ordnance Survey maps in WordPress Last updated:16 June 2014

We’ve just finished another site which embeds OS Openspace maps into WordPress pages: Dartefacts. This uses a custom post type to record the grid reference of an object, which is then displayed on a home page map showing all the items, custom taxonomy pages and search results. This works really well with several hundred items (so far) displaying on the home page, and is fully responsive as well.

OS map showing multiple points and a pop up balloon linking to a page

We’re really pleased with this site (and so is the client!). This builds on our earlier site Rombalds Riding which displays gpx routes as well as points.

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Posted in Web Design and Build | No Comments

Getting the lowest level category (or custom taxonomy) for a WordPress post Last updated:6 June 2014

Working on a client project which applies a hierarchical custom taxonomy to a custom post type I needed to find the lowest level set for the post. Assuming that there is only one hierarchy applied to the post the following does the trick, for categories (running on the single post page):

$categories = get_categories();
$parents = array();
if($categories){
	foreach ($categories as $category){
		$ids[] = $category->term_id;//read the category ids into an array
		if ($category->parent) $parents[] = $category->parent;//read the parent ids into an array
	}
}		
$low_categories =  array_diff ($ids,$parents);//get the ids which are not parents
$lowest_category = array_shift($low_categories);//read the first id (just in case there's more than one)

If you’re working with a custom taxonomy called, say, ‘classification’ then this becomes:

$post_classifications = get_the_terms($get_the_ID,'classification');
if($post_classifications){
	foreach ($post_classifications as $post_classification){
		$ids[] = $post_classification->term_id;
		if ($post_classification->parent) $parents[] = $post_classification->parent;
	}
}		
$low_class =  array_diff ($ids,$parents);
$classification = array_shift($low_class);

Hope this helps someone else…

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Posted in Web Design and Build | 1 Comment