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HomeBackend DevelopmentPHP Tutorialphp利用cookies实现购物车的方法_php技巧

本文实例讲述了php利用cookies实现购物车的方法。分享给大家供大家参考。具体分析如下:

php购物车是在电子商务网站会用到的,一种像超市购物车一样的,选好商品了,先放到自己的购物车里面等好了再到柜台结算,本款php购物车完全按照这个原理来实例的,感兴趣的朋友可以来看看,该实例利用了cookie来实现,代码如下:

复制代码 代码如下:
/**
 * 购物车类 cookies 保存,保存周期为1天 注意:浏览器必须支持cookie才能够使用
 */
class cartapi {
 private $cartarray = array(); // 存放购物车的二维数组
 private $cartcount; // 统计购物车数量
 public $expires = 86400; // cookies过期时间,如果为0则不保存到本地 单位为秒
 /**
  * 构造函数 初始化操作 如果$id不为空,则直接添加到购物车
  *
  */
 public function __construct($id = "",$name = "",$price1 = "",$price2 = "",$price3 = "",$count = "",$image = "",$expires = 86400) {
  if ($id != "" && is_numeric($id)) {
   $this->expires = $expires;
   $this->addcart($id,$name,$price1,$price2,$price3,$count,$image);
  }
 }
 /**
  * 添加商品到购物车
  *
  * @param int $id 商品的编号
  * @param string $name 商品名称
  * @param decimal $price1 商品价格
  * @param decimal $price2 商品价格
  * @param decimal $price3 商品价格
  * @param int $count 商品数量
  * @param string $image 商品图片
  * @return 如果商品存在,则在原来的数量上加1,并返回false
  */
 public function addcart($id,$name,$price1,$price2,$price3,$count,$image) {
  $this->cartarray = $this->cartview(); // 把数据读取并写入数组
  if ($this->checkitem($id)) { // 检测商品是否存在
   $this->modifycart($id,$count,0); // 商品数量加$count
   return false;
  }
  $this->cartarray[0][$id] = $id;
  $this->cartarray[1][$id] = $name;
  $this->cartarray[2][$id] = $price1;
  $this->cartarray[3][$id] = $price2;
  $this->cartarray[4][$id] = $price3;
  $this->cartarray[5][$id] = $count;
  $this->cartarray[6][$id] = $image;
  $this->save();
 }
 /**
  * 修改购物车里的商品
  *
  * @param int $id 商品编号
  * @param int $count 商品数量
  * @param int $flag 修改类型 0:加 1:减 2:修改 3:清空
  * @return 如果修改失败,则返回false
  */
 public function modifycart($id, $count, $flag = "") {
  $tmpid = $id;
  $this->cartarray = $this->cartview(); // 把数据读取并写入数组
  $tmparray = &$this->cartarray;  // 引用
  if (!is_array($tmparray[0])) return false;
  if ($id    return false;
  }
  foreach ($tmparray[0] as $item) {
   if ($item === $tmpid) {
    switch ($flag) {
     case 0: // 添加数量 一般$count为1
      $tmparray[5][$id] += $count;
      break;
     case 1: // 减少数量
      $tmparray[5][$id] -= $count;
      break;
     case 2: // 修改数量
      if ($count == 0) {
       unset($tmparray[0][$id]);
       unset($tmparray[1][$id]);
       unset($tmparray[2][$id]);
       unset($tmparray[3][$id]);
       unset($tmparray[4][$id]);
       unset($tmparray[5][$id]);
       unset($tmparray[6][$id]);
       break;
      } else {
       $tmparray[5][$id] = $count;
       break;
      }
     case 3: // 清空商品
      unset($tmparray[0][$id]);
      unset($tmparray[1][$id]);
      unset($tmparray[2][$id]);
      unset($tmparray[3][$id]);
      unset($tmparray[4][$id]);
      unset($tmparray[5][$id]);
      unset($tmparray[6][$id]);
      break;
     default:
      break;
    }
   }
  }
  $this->save();
 }
 /**
  * 清空购物车
  *
  */
 public function removeall() {
  $this->cartarray = array();
  $this->save();
 }
 /**
  * 查看购物车信息
  *
  * @return array 返回一个二维数组
  */
 public function cartview() {
  $cookie = strips教程lashes($_cookie['cartapi']);
  if (!$cookie) return false;
  $tmpunserialize = unserialize($cookie);
  return $tmpunserialize;
 }
 /**
  * 检查购物车是否有商品
  *
  * @return bool 如果有商品,返回true,否则false
  */
 public function checkcart() {
  $tmparray = $this->cartview();
  if (count($tmparray[0])    return false;
  }
  return true;
 }
 /**
  * 商品统计
  *
  * @return array 返回一个一维数组 $arr[0]:产品1的总价格 $arr[1:产品2得总价格 $arr[2]:产品3的总价格 $arr[3]:产品的总数量
  */
 public function countprice() {
  $tmparray = $this->cartarray = $this->cartview();
  $outarray = array(); //一维数组
  // 0 是产品1的总价格
  // 1 是产品2的总价格
  // 2 是产品3的总价格
  // 3 是产品的总数量
  $i = 0;
  if (is_array($tmparray[0])) {
   foreach ($tmparray[0] as $key=>$val) {
    $outarray[0] += $tmparray[2][$key] * $tmparray[5][$key];
    $outarray[1] += $tmparray[3][$key] * $tmparray[5][$key];
    $outarray[2] += $tmparray[4][$key] * $tmparray[5][$key];
    $outarray[3] += $tmparray[5][$key];
    $i++;
   }
  }
  return $outarray;
 }
 /**
  * 统计商品数量
  *
  * @return int
  */
 public function cartcount() {
  $tmparray = $this->cartview();
  $tmpcount = count($tmparray[0]);
  $this->cartcount = $tmpcount;
  return $tmpcount;
 }
 /**
  * 保存商品 如果不使用构造方法,此方法必须使用
  *
  */
 public function save() {
  $tmparray = $this->cartarray;
  $tmpserialize = serialize($tmparray);
  setcookie("cartapi",$tmpserialize,time()+$this->expires);
 }
 /**
  * 检查购物车商品是否存在
  *
  * @param int $id
  * @return bool 如果存在 true 否则false
  */
 private function checkitem($id) {
  $tmparray = $this->cartarray;
  if (!is_array($tmparray[0])) return;
  foreach ($tmparray[0] as $item) {
   if ($item === $id) return true;
  }
  return false;
 }
}
?>

希望本文所述对大家的PHP程序设计有所帮助。

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