PHP实现的购物车类实例 |
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本文标签:PHP,购物车类 本文实例讲述了PHP实现的购物车类 。分享给大家供大家参考 。具体分析如下: 该购物车类是基于CodeIgniter的购物车类仿写实现的 。 购物车基本功能如下: 1) 将物品加入购物车 1. cart.php文件:
<?php
/**
*
* @author quanshuidingdang
*/
class Cart {
//物品id及名称规则,调试信息控制
private $product_id_rule = \.a-z0-9-_; //小写字母 | 数字 | ._-
private $product_name_rule = \.\:a-z0-9-_;//小写字母 | 数字 | ._-:
private $debug = TRUE;
//购物车
private $_cart_contents = array();
/**
* 构造函数
*
* @param array
*/
public function __construct() {
//是否第一次使用?
if(isset($_SESSION[cart_contents])) {
$this->_cart_contents = $_SESSION[cart_contents];
} else {
$this->_cart_contents[cart_total] = 0;
$this->_cart_contents[total_items] = 0;
}
if($this->debug === TRUE) {
//$this->_log("cart_create_success");
}
}
/**
* 将物品加入购物车
*
* @access public
* @param array 一维或多维数组,必须包含键值名:
id -> 物品ID标识,
qty -> 数量(quantity),
price -> 单价(price),
name -> 物品姓名
* @return bool
*/
public function insert($items = array()) {
//输入物品参数异常
if( ! is_array($items) OR count($items) == 0) {
if($this->debug === TRUE) {
$this->_log("cart_no_items_insert");
}
return FALSE;
}
//物品参数处理
$save_cart = FALSE;
if(isset($items[id])) {
if($this->_insert($items) === TRUE) {
$save_cart = TRUE;
}
} else {
foreach($items as $val) {
if(is_array($val) AND isset($val[id])) {
if($this->_insert($val) == TRUE) {
$save_cart = TRUE;
}
}
}
}
//当插入成功后保存数据到session
if($save_cart) {
$this->_save_cart();
return TRUE;
}
return FALSE;
}
/**
* 更新购物车物品信息
*
* @access public
* @param array
* @return bool
*/
public function update($items = array()) {
//输入物品参数异常
if( !is_array($items) OR count($items) == 0) {
if($this->debug === TRUE) {
$this->_log("cart_no_items_insert");
}
return FALSE;
}
//物品参数处理
$save_cart = FALSE;
if(isset($items[rowid]) AND isset($items[qty])) {
if($this->_update($items) === TRUE) {
$save_cart = TRUE;
}
} else {
foreach($items as $val) {
if(is_array($val) AND isset($val[rowid]) AND isset($val[qty])) {
if($this->_update($val) === TRUE) {
$save_cart = TRUE;
}
}
}
}
//当更新成功后保存数据到session
if($save_cart) {
$this->_save_cart();
return TRUE;
}
return FALSE;
}
/**
* 获取购物车物品总金额
*
* @return int
*/
public function total() {
return $this->_cart_contents[cart_total];
}
/**
* 获取购物车物品种类
*
* @return int
*/
public function total_items() {
return $this->_cart_contents[total_items];
}
/**
* 获取购物车
*
* @return array
*/
public function contents() {
return $this->_cart_contents;
}
/**
* 获取购物车物品options
*
* @param string
* @return array
*/
public function options($rowid = ) {
if($this->has_options($rowid)) {
return $this->_cart_contents[$rowid][options];
} else {
return array();
}
}
/**
* 清空购物车
*
*/
public function destroy() {
unset($this->_cart_contents);
$this->_cart_contents[cart_total] = 0;
$this->_cart_contents[total_items] = 0;
unset($_SESSION[cart_contents]);
}
/**
* 判断购物车物品是否有options选项
*
* @param string
* @return bool
*/
private function has_options($rowid = ) {
if( ! isset($this->_cart_contents[$rowid][options]) OR count($this->_cart_contents[$rowid][options]) === 0) {
return FALSE;
}
return TRUE;
}
/**
* 插入数据
*
* @access private
* @param array
* @return bool
*/
private function _insert($items = array()) {
//输入物品参数异常
if( ! is_array($items) OR count($items) == 0) {
if($this->debug === TRUE) {
$this->_log("cart_no_data_insert");
}
return FALSE;
}
//如果物品参数无效(无id/qty/price/name)
if( ! isset($items[id]) OR ! isset($items[qty]) OR ! isset($items[price]) OR ! isset($items[name])) {
if($this->debug === TRUE) {
$this->_log("cart_items_data_invalid");
}
return FALSE;
}
//去除物品数量左零及非数字字符
$items[qty] = trim(preg_replace(/([^0-9])/i, , $items[qty]));
$items[qty] = trim(preg_replace(/^([0]+)/i, , $items[qty]));
//如果物品数量为0,或非数字,则我们对购物车不做任何处理!
if( ! is_numeric($items[qty]) OR $items[qty] == 0) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(qty)_invalid");
}
return FALSE;
}
//物品ID正则判断
if( ! preg_match(/^[.$this->product_id_rule.]+$/i, $items[id])) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(id)_invalid");
}
return FALSE;
}
//物品名称正则判断
if( ! preg_match(/^[.$this->product_name_rule.]+$/i, $items[name])) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(name)_invalid");
}
return FALSE;
}
//去除物品单价左零及非数字(带小数点)字符
$items[price] = trim(preg_replace(/([^0-9\.])/i, , $items[price]));
$items[price] = trim(preg_replace(/^([0]+)/i, , $items[price]));
//如果物品单价非数字
if( ! is_numeric($items[price])) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(price)_invalid");
}
return FALSE;
}
//生成物品的唯一id
if(isset($items[options]) AND count($items[options]) >0) {
$rowid = md5($items[id].implode(, $items[options]));
} else {
$rowid = md5($items[id]);
}
//加入物品到购物车
unset($this->_cart_contents[$rowid]);
$this->_cart_contents[$rowid][rowid] = $rowid;
foreach($items as $key => $val) {
$this->_cart_contents[$rowid][$key] = $val;
}
return TRUE;
}
/**
* 更新购物车物品信息(私有)
*
* @access private
* @param array
* @return bool
*/
private function _update($items = array()) {
//输入物品参数异常
if( ! isset($items[rowid]) OR ! isset($items[qty]) OR ! isset($this->_cart_contents[$items[rowid]])) {
if($this->debug == TRUE) {
$this->_log("cart_items_data_invalid");
}
return FALSE;
}
//去除物品数量左零及非数字字符
$items[qty] = preg_replace(/([^0-9])/i, , $items[qty]);
$items[qty] = preg_replace(/^([0]+)/i, , $items[qty]);
//如果物品数量非数字,对购物车不做任何处理!
if( ! is_numeric($items[qty])) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(qty)_invalid");
}
return FALSE;
}
//如果购物车物品数量与需要更新的物品数量一致,则不需要更新
if($this->_cart_contents[$items[rowid]][qty] == $items[qty]) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(qty)_equal");
}
return FALSE;
}
//如果需要更新的物品数量等于0,表示不需要这件物品,从购物车种清除
//否则修改购物车物品数量等于输入的物品数量
if($items[qty] == 0) {
unset($this->_cart_contents[$items[rowid]]);
} else {
$this->_cart_contents[$items[rowid]][qty] = $items[qty];
}
return TRUE;
}
/**
* 保存购物车数据到session
*
* @access private
* @return bool
*/
private function _save_cart() {
//首先清除购物车总物品种类及总金额
unset($this->_cart_contents[total_items]);
unset($this->_cart_contents[cart_total]);
//然后遍历数组统计物品种类及总金额
$total = 0;
foreach($this->_cart_contents as $key => $val) {
if( ! is_array($val) OR ! isset($val[price]) OR ! isset($val[qty])) {
continue;
}
$total += ($val[price] * $val[qty]);
//每种物品的总金额
$this->_cart_contents[$key][subtotal] = ($val[price] * $val[qty]);
}
//设置购物车总物品种类及总金额
$this->_cart_contents[total_items] = count($this->_cart_contents);
$this->_cart_contents[cart_total] = $total;
//如果购物车的元素个数少于等于2,说明购物车为空
if(count($this->_cart_contents) <= 2) {
unset($_SESSION[cart_contents]);
return FALSE;
}
//保存购物车数据到session
$_SESSION[cart_contents] = $this->_cart_contents;
return TRUE;
}
/**
* 日志记录
*
* @access private
* @param string
* @return bool
*/
private function _log($msg) {
return @file_put_contents(cart_err.log, $msg, FILE_APPEND);
}
}
/*End of file cart.php*/
/*Location /htdocs/cart.php*/
2. cart_demo.php文件如下:
<?php
session_start();
require_once(cart.php);
$items = array(
0 => array(
id => sp001,
qty => 20,
price => 10.50,
name => a002,
options => array(
made => china,
company => bgi
)
),
1 => array(
id => sp002,
qty => 1,
price => 3.50,
name => b002
)
);
$arr = array(
rowid => 86dbb7cb58a667558b4bbb1f60330028,
qty => 21
);
$cart = new Cart();
$cart->insert($items);
//var_dump($cart->contents());
$cart->update($arr);
var_dump($cart->contents());
//$cart->destroy();
//var_dump($_SESSION[cart_contents]);
/*end of php*/
希望本文所述对大家的php程序设计有所帮助 。 |