Final Related Custom Items

gistfile1.aw

<?php

function vt_related($taxonomy = null, $post_type = null) {

	global $post;

	// Set the default taxonomy
	if (!$taxonomy) {
		$taxonomy = 'service_tag'; 
	}

	// Set the default post type
	if (!$post_type) {
		$post_type = 'services';
	}

	//Get the terms for the current post
	$terms = get_the_terms( $post->ID , $taxonomy );

	// Make sure the query doesn't include current post
	$no_duplicate[] = $post->ID;

	// Build the term IDS for usage inside the query
	if( !empty( $terms ) ):
		foreach( $terms as $term ):
			$term_ids[] = $term->term_id;
		endforeach;
	endif;


	// Make sure no duplicates are present in the term ID's
	$term_ids = array_unique( $term_ids );

	// Build the query arguments		
	$args = array(
			'post_type' => array( $post_type ),
			'tax_query' => array(
				array(
					'taxonomy' => $taxonomy,
					'field' => 'id',
					'terms' => $term_ids
				)
			),
			'showposts' => 4,
			'caller_get_posts' => 1,
			'post__not_in' => $no_duplicate
	);

	// Use the arguments and query the related posts
	$related_posts = query_posts( $args );


	// Custom output based on the post_type
	if ($post_type == 'services'):
		echo '<h3>Related Products &amp; Services</h3>';
		$content = 'services';
	else:
		echo '<h3>Related Case Studies</h3>';
		$content = 'case studies';
	endif;


	if( $related_posts ) :

		echo '<ul>';

		foreach( $related_posts as $related ): 
			$no_duplicate[] = $post->ID;
			echo '<li><a href="' . get_permalink( $related->ID ) . '" title="' . $related->post_title . '">' . $related->post_title . '</a></li>';		
		endforeach; 

		echo '</ul>';

		wp_reset_query();

	else :
	
	echo '<p>Sorry no related ' . $content . ' could be found.</p>';
	
	endif;

}