PHP shopping cart class Cartclassphp definition and usage examples

The example in this article describes the definition and usage of the PHP shopping cart class Cart.class.php. I share it with you for your reference. The details are as follows:

The previous developer used JS technology to develop a front-end shopping cart (JS was used for deletion and addition), but the browser compatibility was not good, and something finally went wrong today. , a foreigner purchased a product, and because he used an unknown browser, chrome, opera, etc., I had an extra job, rewriting the shopping cart.

I don’t plan to use JS anymore, and directly consider php .

I found a shopping cart class, which is very convenient to use.

Cart.class.php source code:

<&#63;php
/**
 * Cart
 *
 * 购物车类
 *
 * @author doodoo<pwtitle @yahoo.com.cn="">
 * @package  Cart
 * @category Cart
 * @license  PHP License
 * @access  public
 * @version  $Revision: 1.10 $
 */
Class Cart{
 var $cart;
 var $totalCount; //商品总数量
 var $totalPrices; //商品总金额
 /**
  * Cart Constructor
  *
  * 类的构造函数，使购物车保持稳定的初始化状态
  *
  * @static
  * @access public
  * @return void 无返回值
  * @param void 无参数
  */
 function Cart(){
 $this->totalCount = 0;
 $this->totalPrice = 0;
 $this->cart = array();
 }
 // }}}
 // {{{ add($item)
 /**
 * 增加商品到当前购物车
 *
 * @access public
 * @param array $item 商品信息（一维数组：array(商品ID,商品名称,商品单价,商品数量)）
 * @return array 返回当前购物车内商品的数组
 */
 function add($item){
 if(!is_array($item)||is_null($item)) return $this->cart;
 if(!is_numeric(end($item))||(!is_numeric(prev($item)))) {
 echo "价格和数量必须是数字";
 return $this->cart;
 }
 reset($item); //这一句是必须的，因为上面的判断已经移动了数组的指标
 $key = current($item);
 if($key=="") return $this->cart;
 if($this->_isExists($key)){ //商品是否已经存在？
 $this->cart[$key]['count'] = end($item);
 return $this->cart;
 }
 $this->cart[$key]['ID'] = $key;
 $this->cart[$key]['name'] = next($item);
 $this->cart[$key]['price'] = next($item);
 $this->cart[$key]['count'] = next($item);
 return $this->cart;
 }
 // }}}
 // {{{ add($item)
 /**
 * 从当前购物车中取出部分或全部商品
 * 当 $key=="" 的时候，清空当前购物车
 * 当 $key!=""&&$count=="" 的时候，从当前购物车中拣出商品ID号为 $key 的全部商品
 * 当 $key!=""&&$count!="" 的时候，从当前购物车中拣出 $count个 商品ID号为 $key 的商品
 *
 * @access public
 * @param string $key 商品ID
 * @return mixed 返回真假或当前购物车内商品的数组
 */
 function remove($key="",$count=""){
 if($key=="") {
 $this->cart = array();
 return true;
 }
 if(!array_key_exists($key,$this->cart)) return false;
 if($count==""){ //移去这一类商品
 unset($this->cart[$key]);
 }else{ //移去$count个商品
 $this->cart[$key]['count'] -= $count;
 if($this->cart[$key]['count']<=0) unset($this->cart[$key]);
 }
 return $this->cart;
 }
 // }}}
 // {{{ modi($key,$value)
 /**
 * 修改购物车内商品ID为 $key 的商品的数量为 $value
 *
 * @access public
 * @param string $key 商品ID
 * @param int $value 商品数量
 * @return array 返回当前购物车内商品的数组;
 */
 function modi($key,$value){
 if(!$this->_isExists($key)) return $this->cart(); //不存在此商品，直接返回
 if($value<=0){  // value 太小，全部删除
 unset($this->cart[$key]);
 return $this->cart;
 }
 $this->cart[$key]['count'] = $value;
 return $this->cart;
 }
 /**
 * 返回当前购物车内商品的数组
 *
 * @access public
 * @return array 返回当前购物车内商品的数组;
 */
 function getCart(){
 return $this->cart;
 }
 // }}}
 // {{{ _isExists($key)
 /**
 * 判断当前购物车中是否存在商品ID号为$key的商品
 *
 * @access private
 * @param string $key 商品ID
 * @return bool true or false;
 */
 function _isExists($key)
 {
 if(isset($this->cart[$key])&&!empty($this->cart[$key])&&array_key_exists($key,$this->cart))
 return true;
 return false;
 }
 // }}}
 // {{{ isEmpty()
 /**
 * 判断当前购物车是否为空，即没有任何商品
 *
 * @access public
 * @return bool true or false;
 */
 function isEmpty(){
 return !count($this->cart);
 }
 // }}}
 // {{{ _stat()
 /**
 * 取得部分统计信息
 *
 * @access private
 * @return bool true or false;
 */
 function _stat(){
 if($this->isEmpty()) return false;
 foreach($this->cart as $item){
 $this->totalCount = @end($item);
 $this->totalPrices = @prev($item);
 }
 return true;
 }
 // }}}
 // {{{ totalPrices()
 /**
 * 取得当前购物车所有商品的总金额
 *
 * @access public
 * @return float 返回金额;
 */
 function totalPrices(){
 if($this->_stat())
 return $this->totalPrices;
 return 0;
 }
 // }}}
 // {{{ isEmpty()
 /**
 * 取得当前购物车所有商品的总数量和
 *
 * @access public
 * @return int ;
 */
 function totalCount(){
 if($this->_stat())
 return $this->totalCount;
 return 0;
 }
}//End Class Cart
?>

Methods to use this class:

<&#63;php
header("Content-type:text/html;charset=utf8");
//调用实例
require_once 'Cart.class.php';
session_start();
if(!isset($_SESSION['cart'])) {
 $_SESSION['cart'] = new Cart;
}
$cart =& $_SESSION['cart'];
if( ($_SERVER['REQUEST_METHOD']=="POST")&&($_POST['action']=='add') ){
 $p = $_POST['p'];
 $items = $cart->add($p);
}
if( ($_GET['action']=='remove')&&($_GET['key']!="") ) {
 $items = $cart->remove($_GET['key']);
}
if( ($_SERVER['REQUEST_METHOD']=="POST")&&($_POST['action']=='modi') ){
 $key = $_POST['key'];
 $value = $_POST['value'];
 for($i=0;$i<count ($key);$i="" $items="$cart-" ){="">modi($key[$i],$value[$i]);
 }
}
$items = $cart->getCart();
//打印
echo "";
setlocale(LC_MONETARY, 'it_IT');
foreach($items as $item){
 echo "";
 echo "<table border="1"><tbody><tr><form action="\"index.php\"" method="\" post\&#63;&#63;=""></form><td>ID：".$item['ID']."<input type="hidden" value=".$item['ID']." name="key[]">"; echo "</td><td>产品：".$item['name']; echo "</td><td>单价：".$item['price']; echo "</td><td><input value=".$item['count']." name="value[]">"; $sum = $item['count']*$item['price']; echo "</td><td>合计：".round($sum,2); echo "</td><td><input  type="button" value="删除">"; } echo "<input type="hidden" value="modi" name="action">"; echo "</td></tr><tr><td colspan="7"><input type="submit" value="提交查询内容">"; echo "</td></tr></tbody></table>";
?>
<hr>
<form action="tmp.php" method="post">
ID:<input name="p[]">
品名：<input name="p[]">
单价：<input name="p[]">
数量：<input name="p[]">
<input type="hidden" value="add" name="action">
<input type="submit" value="提交查询内容">
</form></count>

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I hope this article will be helpful to everyone PHP programming helps.

The above introduces the definition and usage examples of the PHP shopping cart class Cartclassphp, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.