[WordPress] Modifying the WordPress query to select distinct records.

00-select-distinct-search-records.php

<?php

add_filter( 'posts_distinct', 'acme_select_distinct_search_records' );
/**
 * Adds 'DISTINCT' to the query that's executing on the search page.
 *
 * @param     string $distinct    The initial DISTINCT clause.
 * @return    string $distinct    The 'DISTINCT' keyword, if we're on the search template.
 */
function acme_select_distinct_search_records( $distinct ) {
  
	if ( is_admin() || ! is_search() ) {
		return $distinct;
	}
	
	return 'DISTINCT';

}