<?php
use think\Db;
/**
 * ============================================================================
 */
/**
 * 获取购物车数量
 */
function WSTCartNum(){
	$userId = session('WST_USER.userId');
	$cartNum = Db::name('carts')->where(['userId'=>$userId])->field('cartId')->select();
	$count = count($cartNum);
	return $count;
}