How to increase or decrease shopping in php

php method to increase or decrease shopping: 1. Store the content added to the shopping cart in a two-dimensional array in the session, with code such as "$_SESSION['shop_cart']"; 2. In the form of an array Stores the product ID and quantity; 3. By adding and deleting the array, the products in the shopping cart can be increased or decreased.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

How to increase or decrease php shopping?

This is actually very simple. The content added to the shopping cart is stored in a two-dimensional array in the session, such as $_SESSION['shop_cart'], which stores the product ID and quantity in the form of an array. :$_SESSION['cart'] = array(

array('goods_id' => '', 'goods_num'),    // 第一个商品
array('goods_id' => '', 'goods_num'),    // 第二个商品
...
array('goods_id' => '', 'goods_num')     // 第n个商品
);

That's it, then traverse this array in the html file, give it a style, and it will be a general shopping cart (as for the specific information of the product) , just query the data table according to the product ID);

Adding and deleting products in the shopping cart is actually adding and deleting the array,

Add: $_SESSION['cart'] [] = array('goods_id' => '', 'goods_num');

Delete: unset($_SESSION['cart'][n]);

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