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PHP shopping cart library

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PHP shopping cart library

<?php
class Cart {
  //物品id及名称规则,调试信息控制
  private $product_id_rule = '\.a-z0-9-_'; //小写字母 | 数字 | ._-
  private $product_name_rule = '\.\:a-z0-9-_';//小写字母 | 数字 | ._-:
  private $debug = TRUE;
  private $_cart_contents = array();
  public function __construct() {
    //是否第一次使用?
    if(isset($_SESSION['cart_contents'])) {
      $this->_cart_contents = $_SESSION['cart_contents'];
    } else {
      $this->_cart_contents['cart_total'] = 0;
      $this->_cart_contents['total_items'] = 0;
    }
    if($this->debug === TRUE) {
      //$this->_log("cart_create_success");
    }
  }

PHP's shopping cart class library mainly introduces the shopping cart class implemented by PHP, which can realize basic adding, deleting, statistics and other related functions of the shopping cart.
The basic functions of the shopping cart are as follows: 1) Add items Shopping cart 2) Delete items from the shopping cart 3) Update shopping cart item information [1/-1] 4) Statistics of shopping cart items 1. Total items 2. Total quantity 3. Total amount 5) Statistics of single shopping items Statistics of quantity and amount 6) Clear shopping

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