Cacher is the code snippet organizer for pro developers

/**
 * Retrieve a page given its slug.
 *
 * @param string $pageSlug : Page slug
 * @param string $output : Optional. Output type. OBJECT, ARRAY_N, or ARRAY_A. Default OBJECT.
 * @param string|array $postType : Optional. Post type or array of post types. Default 'page'.
 *
 * @return WP_Post|array|void : WP_Post on success or null on failure
 */
function get_page_by_slug($pageSlug, $output = OBJECT, $postType = 'page')
{
    $pageID = get_page_id_by_slug($pageSlug, $postType);

    if ($pageID) {
        return get_post($pageID, $output);
    }
}

/**
 * Retrieve a page id given its slug.
 *
 * @global wpdb $wpdb : WordPress database abstraction object.
 *
 * @param string $pageSlug : Page slug
 * @param string|array $postType : Optional. Post type or array of post types. Default 'page'.
 *
 * @return string|void : ID on success or null on failure
 */
function get_page_id_by_slug($pageSlug, $postType = 'page')
{
    global $wpdb;
    $language = ICL_LANGUAGE_CODE;

    if (is_array($postType)) {
        $postType = esc_sql($postType);
        $postTypeInString = "'" . implode("','", $postType) . "'";
        $sql = $wpdb->prepare("
            SELECT ID
            FROM $wpdb->posts
            WHERE post_name = %s
            AND post_type IN ($postTypeInString)
        ", $pageSlug);
    } else {
        $sql = $wpdb->prepare("
            SELECT ID
            FROM $wpdb->posts
            WHERE post_name = %s
            AND post_type = %s
        ", $pageSlug, $postType);
    }

    $id = $wpdb->get_var($sql);

    if ($id) {
        return $id;

        // Use WPML filter to return the localized version
        //return apply_filters('wpml_object_id', $id, 'page', true, $language);
    }
}