Get WCK select options by slug

get_wck_select_by_slug.php

<?php
function get_wck_select_by_slug($slug) {    
    global $wpdb;
    $results = $wpdb->get_results( "select * from $wpdb->postmeta where meta_value = '".$slug."'", ARRAY_A );
    $post_id = $results[0]['post_id'];
    $separator = explode('_', $results[0]['meta_key']);
    $suffix = isset($separator[1]) ? '_'.$separator[1] : '';
    $options = explode(',', get_post_meta($post_id, 'options'.$suffix, true));
    $labels = explode(',', get_post_meta($post_id, 'labels'.$suffix, true));
    /* initialize var */
    $return_var = array();
    /* create array for select */
    foreach ($options as $key => $value) {
        $return_var[$value] = $labels[$key];
    }
    return $return_var;
}
?>