Use a PHP variable within an SQL statement
I am using wordpress and I have an SQL statement (as below) to gather the tags for a specific category. The only issue with this is that the table names may change (i.e. they will not always be wp_*). The function $pfx = $wpdb->base_prefix; returns what the wordpress database prefix is.
How can I use $pfx inside my SQL statement below (instead of wp_ ).
global $wpdb; $tags = $wpdb->get_results (" SELECT DISTINCT terms2.term_id as tag_id, terms2.name as tag_name, null as tag_link, t2.count as post_total FROM wp_posts as p1 LEFT JOIN wp_term_relationships as r1 ON p1.ID = r1.object_ID LEFT JOIN wp_term_taxonomy as t1 ON r1.term_taxonomy_id = t1.term_taxonomy_id LEFT JOIN wp_terms as terms1 ON t1.term_id = terms1.term_id, wp_posts as p2 LEFT JOIN wp_term_relationships as r2 ON p2.ID = r2.object_ID LEFT JOIN wp_term_taxonomy as t2 ON r2.term_taxonomy_id = t2.term_taxonomy_id LEFT JOIN wp_terms as terms2 ON t2.term_id = terms2.term_id WHERE t1.taxonomy = 'category' AND p1.post_status = 'publish' AND terms1.term_id IN (".$args['categories'].") AND t2.taxonomy = 'post_tag' AND p2.post_status = 'publish' AND p1.ID = p2.ID ORDER BY post_total DESC ");
Change for example
LEFT JOIN wp_term_relationships
LEFT JOIN ".$pfx."term_relationships