get_next_post_sort │ filter-hook │ WP 2.5.0

Filters the ORDER BY clause in the SQL for an adjacent post query.

Usage

add_filter( 'get_next_post_sort', 'wp_kama_get_next_post_sort_filter', 10, 3 );

/**
 * Function for `get_next_post_sort` filter-hook.
 * 
 * @param string  $order_by The `ORDER BY` clause in the SQL.
 * @param WP_Post $post     WP_Post object.
 * @param string  $order    Sort order. 'DESC' for previous post, 'ASC' for next.
 *
 * @return string
 */
function wp_kama_get_next_post_sort_filter( $order_by, $post, $order ){

	// filter...
	return $order_by;
}

$order_by(string)

The ORDER BY clause in the SQL.

$post(WP_Post)

WP_Post object.

$order(string)

Sort order. 'DESC' for previous post, 'ASC' for next.

Changelog

Where the hook is called

$sort = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order LIMIT 1", $post, $order );

Where the hook is used in WordPress