order by meta_query wordpress
$q = new WP_Query( array( 'meta_key' => 'population', //setting the meta_key which will be used to order 'orderby' => 'meta_value', //if the meta_key (population) is numeric use meta_value_num instead 'order' => 'DESC', //setting order direction 'meta_query' => array( 'relation' => 'AND', //setting relation between queries group array( 'relation' => 'OR', //setting relation between this inside query array( 'key' => 'state', 'value' => 'Wisconsin', ), array( 'key' => 'timezone', 'value' => 'central', ) ), array( 'key' => 'city', 'compare' => 'EXISTS', ) ) ) );