INSERTING Data into table with placeholders
I found the answer, in the codex. I just used it’s code and adapted it, this code: $wpdb->query( $wpdb->prepare( ” INSERT INTO $wpdb->postmeta ( post_id, meta_key, meta_value ) VALUES ( %d, %s, %s ) “, 10, $metakey, $metavalue ) ); So it works now.