php利用cookies实现购物车的方法_PHP
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:
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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