The examples in this article describe the definition and usage of the PHP shopping cart class Cart.class.php. Share it with everyone 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 deleting and adding things), but the browser compatibility was not good. Today Finally something went wrong. A foreigner purchased a product. It was possible that he used an unknown browser, chrome, opera... so I had an extra job, rewriting the shopping cart.
No I plan to use JS again and directly consider PHP.
I found a shopping cart class, which is very convenient to use.
Related learning recommendations:PHP programming from entry to proficiency
Cart.class.php
Source code:
* @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 $this->totalCount; return 0; } }//End Class Cart ?>
Methods to use this class:
add($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;$imodi($key[$i],$value[$i]); } } $items = $cart->getCart(); //打印 echo ""; setlocale(LC_MONETARY, 'it_IT'); foreach($items as $item){ echo ""; echo " "; ?>
ID:".$item['ID'].""; echo " 产品:".$item['name']; echo " 单价:".$item['price']; echo " "; $sum = $item['count']*$item['price']; echo " 合计:".round($sum,2); echo " "; } echo ""; echo " "; echo "
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