gistfile1.php

<?php
/************************************************
* This is not currently working.
************************************************/
add_action( 'pre_get_posts', 'cd_listing_sort_order' );
/**
* Change the post order for listings
*
* @author Carrie Dils
* @link http://www.billerickson.net/customize-the-wordpress-query/
* @reference http://codex.wordpress.org/Class_Reference/WP_Query
*
*/
function cd_listing_sort_order( $query ) {

	if ( ! is_admin() && $query->is_main_query() && is_post_type_archive( 'listing' ) ) {

	$raw_price = '_listing_price'; //convert prince to integer
	// convert "," to "."
	$raw_price = str_replace(',', '.', $raw_price);

	// remove everything except numbers and dot "."
	$raw_price = preg_replace("/[^0-9\.]/", "", $raw_price);

	// remove all seperators from first part and keep the end
	$raw_price = str_replace('.', '',substr($raw_price, 0, -3)) . substr($raw_price, -3);

	$price = intval($raw_price);

	$query->set( 'orderby', 'meta_value_num' );
	$query->set( 'order', 'DESC' ); //list high to low
	$query->set( 'meta_key', $price );
	$query->set( 'posts_per_page', '50' );
	}

}