WordPress related posts function
Monday 28th December 2009 by admin
Here is today’s addition to WordPress functions & tips – a quick way to add a simple related WordPress posts function without the need for a WordPress plugin.
This function works by linking the tags on a single page or single post page and can be used anywhere outside the loop e.g. the sidebar.
Firstly declare a global variable based on the post ID
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global $constant_post_id;
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$constant_post_id = $post->ID;
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Use the wp_get_object_terms to get the post tags realting to the post in question
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$tags = wp_get_object_terms($constant_post_id, ‘post_tag’);
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Start a foreach statement based on each tag
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foreach ($tags as $tag) :
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$tag_content = $tag->slug;
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// Show the tag name if you wish //
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// Start an unordered list //
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echo ‘<ul>’;
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Get the tag ’slug’ as this is used in the following get_posts query
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$tag_slug = $tag_content;
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Now run a get_posts using the $tag_slug (above) and the post->ID which we decalred as a global in section 1
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$relatedposts = get_posts(‘tag=’.$tag_slug.‘&exclude=’.$constant_post_id.”);
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foreach(relatedposts as relatedposts) :
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setup_postdata(relatedposts);
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endforeach;
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// end the unordered list – if you are using one //
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echo ‘</ul>’;
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endforeach;
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And don’t forget to reset the query
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wp_reset_query();
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Voila a related posts query based on WordPress tags. All that is left is to make it a function ready to past into your functions.php file so you can simply use it anywhere you want here goes:
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function my_related_posts() {
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global $constant_post_id;
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$constant_post_id = $post->ID;
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$tags = wp_get_object_terms($constant_post_id, ‘post_tag’);
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foreach ($tags as $tag) :
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$tag_content = $tag->slug;
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// Show the tag name if you wish //
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// Start an unordered list //
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echo ‘<ul>’;
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$tag_slug = $tag_content;
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$relatedposts = get_posts(‘tag=’.$tag_slug.‘&exclude=’.$constant_post_id.”);
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foreach(relatedposts as relatedposts) :
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setup_postdata(relatedposts);
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endforeach;
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// end the unordered list – if you are using one //
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echo ‘</ul>’;
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endforeach;
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}
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So to use this function all you need to do is call my_related_posts();
Hope this helps
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