本文实例讲述了PHP+pdo实现的购物车类。分享给大家供大家参考,具体如下:
<?PHP session_start(); class Cart { public $pdo = null; public function __construct($config) { $host = $config['host']; $user = $config['user']; $db = $config['db']; $pwd = $config['pwd']; if (empty($_SESSION['user_id'])) { return show(0,'请先登录'); } try { $this->pdo = new PDO("MysqL:host=$host;dbname=$db","$user","$pwd",array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION)); $this->pdo->query("set names utf8"); } catch (PDOException $e) { echo $e->getMessage(); } } //添加商品到购物车 public function add_cart($productid,$num) { $sql = "select price from shop_product where id=?"; $stmt = $this->pdo->prepare($sql); $stmt->execute(array($productid)); $data = $stmt->fetch(PDO::FETCH_ASSOC); $price = $data['price']; $createtime = time(); $sql = "select * from shop_cart where productid=? and userid=?"; $stmt = $this->pdo->prepare($sql); $stmt->execute(array($productid,$_SESSION['user_id'])); $data = $stmt->fetch(PDO::FETCH_ASSOC); if ($data) { $sql = "update shop_cart set num=num+? where userid=? and productid=?"; $params = array($num,$_SESSION['user_id'],$productid); } else { $sql = "insert into shop_cart(productid,num,userid,price,createtime) values(?,?,?)"; $params = array($productid,$num,$price,$createtime); } $stmt = $this->pdo->prepare($sql); $stmt->execute($params); $rows = $stmt->rowCount(); return $rows ? show(1,'ok',$rows) : show(0,'fail'); } //修改购买数量 public function change_num($productid,$num) { $sql = "update shop_cart set num=? where userid=? and productid=?"; $stmt = $this->pdo->prepare($sql); $stmt->execute(array($num,$productid)); $rows = $stmt->rowCount(); return $rows ? show(1,'fail'); } //清空购物车 public function clear_cart() { $sql = "delete from shop_cart where userid=?"; $stmt = $this->pdo->prepare($sql); $this->pdo->execute(array($this->user_id)); $rows = $stmt->rowCount(); return $rows ? show(1,'fail'); } //从购物车中删除商品 public function remove_cart($productid) { $sql = "delete from shop_cart where productid=? and userid=?"; $stmt = $this->pdo->prepare($sql); $stmt->execute(array($productid,$_SESSION['user_id'])); $rows = $stmt->rowCount(); return $rows ? show(1,'fail'); } } //处理数据 function show($status,$message,$data = array()) { $result = array( 'status' => $status,'message' => $message,'data' => $data ); exit(json_encode($result)); } //简单使用 $user = [ 'host' => '','user' => 'root','pwd' => 'root','db' => 'shop',]; $productid = intval($_POST['productid']); $num = intval($_POST['num']); $cart = new Cart($user); //添加到购物车 $cart->add_cart($productid,$num); //删除指定的商品 $cart->remove_cart($productid); //清空 $cart->clear_cart(); ?>
更多关于PHP相关内容感兴趣的读者可查看本站专题:《PHP+MysqL购物车开发专题》、《PHP面向对象程序设计入门教程》、《PHP数学运算技巧总结》、《PHP数组(Array)操作技巧大全》、《PHP字符串(string)用法总结》、《PHP数据结构与算法教程》、《PHP程序设计算法总结》、《PHP正则表达式用法总结》、及《PHP常见数据库操作技巧汇总》
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