《PHP實例：PHP實現(xiàn)的購物車類實例》要點：
本文介紹了PHP實例：PHP實現(xiàn)的購物車類實例，希望對您有用。如果有疑問，可以聯(lián)系我們。
本文實例講述了PHP實現(xiàn)的購物車類.分享給大家供大家參考.具體分析如下：PHP實例
該購物車類是基于CodeIgniter的購物車類仿寫實現(xiàn)的.PHP實例
購物車基本功能如下：PHP實例
1) 將物品加入購物車
2) 從購物車中刪除物品
3) 更新購物車物品信息 【+1/-1】
4) 對購物車物品進行統(tǒng)計
?? 1. 總項目
?? 2. 總數(shù)量
?? 3. 總金額
5) 對購物單項物品的數(shù)量及金額進行統(tǒng)計
6) 清空購物車PHP實例
1. cart.php文件：PHP實例
?<?php
/**
*
* @author quanshuidingdang
*/
class Cart {
//物品id及名稱規(guī)則,調(diào)試信息控制
private $product_id_rule = '\.a-z0-9-_'; //小寫字母 | 數(shù)字 | ._-
private $product_name_rule = '\.\:a-z0-9-_';//小寫字母 | 數(shù)字 | ._-:
private $debug = TRUE;
//購物車
private $_cart_contents = array();
/**
* 構(gòu)造函數(shù)
*
* @param array
*/
public function __construct() {
//是否第一次使用?
if(isset($_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) {
//$this->_log("cart_create_success");
}
}
/**
* 將物品加入購物車
*
* @access public
* @param array 一維或多維數(shù)組,必須包含鍵值名:
id -> 物品ID標識,
qty -> 數(shù)量(quantity),
price -> 單價(price),
name -> 物品姓名
* @return bool
*/
public function insert($items = array()) {
//輸入物品參數(shù)異常
if( ! is_array($items) OR count($items) == 0) {
if($this->debug === TRUE) {
$this->_log("cart_no_items_insert");
}
return FALSE;
}
//物品參數(shù)處理
$save_cart = FALSE;
if(isset($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) {
$save_cart = TRUE;
}
}
}
}
//當插入成功后保存數(shù)據(jù)到session
if($save_cart) {
$this->_save_cart();
return TRUE;
}
return FALSE;
}
/**
* 更新購物車物品信息
*
* @access public
* @param array
* @return bool
*/
public function update($items = array()) {
//輸入物品參數(shù)異常
if( !is_array($items) OR count($items) == 0) {
if($this->debug === TRUE) {
$this->_log("cart_no_items_insert");
}
return FALSE;
}
//物品參數(shù)處理
$save_cart = FALSE;
if(isset($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) {
$save_cart = TRUE;
}
}
}
}
//當更新成功后保存數(shù)據(jù)到session
if($save_cart) {
$this->_save_cart();
return TRUE;
}
return FALSE;
}
/**
* 獲取購物車物品總金額
*
* @return int
*/
public function total() {
return $this->_cart_contents['cart_total'];
}
/**
* 獲取購物車物品種類
*
* @return int
*/
public function total_items() {
return $this->_cart_contents['total_items'];
}
/**
* 獲取購物車
*
* @return array
*/
public function contents() {
return $this->_cart_contents;
}
/**
* 獲取購物車物品options
*
* @param string
* @return array
*/
public function options($rowid = '') {
if($this->has_options($rowid)) {
return $this->_cart_contents[$rowid]['options'];
} else {
return array();
}
}
/**
* 清空購物車
*
*/
public function destroy() {
unset($this->_cart_contents);
$this->_cart_contents['cart_total'] = 0;
$this->_cart_contents['total_items'] = 0;
unset($_SESSION['cart_contents']);
}
/**
* 判斷購物車物品是否有options選項
*
* @param string
* @return bool
*/
private function has_options($rowid = '') {
if( ! isset($this->_cart_contents[$rowid]['options']) OR count($this->_cart_contents[$rowid]['options']) === 0) {
return FALSE;
}
return TRUE;
}
/**
* 插入數(shù)據(jù)
*
* @access private
* @param array
* @return bool
*/
private function _insert($items = array()) {
//輸入物品參數(shù)異常
if( ! is_array($items) OR count($items) == 0) {
if($this->debug === TRUE) {
$this->_log("cart_no_data_insert");
}
return FALSE;
}
//如果物品參數(shù)無效(無id/qty/price/name)
if( ! isset($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;
}
//去除物品數(shù)量左零及非數(shù)字字符
$items['qty'] = trim(preg_replace('/([^0-9])/i', '', $items['qty']));
$items['qty'] = trim(preg_replace('/^([0]+)/i', '', $items['qty']));
//如果物品數(shù)量為0,或非數(shù)字,則我們對購物車不做任何處理!
if( ! is_numeric($items['qty']) OR $items['qty'] == 0) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(qty)_invalid");
}
return FALSE;
}
//物品ID正則判斷
if( ! preg_match('/^['.$this->product_id_rule.']+$/i', $items['id'])) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(id)_invalid");
}
return FALSE;
}
//物品名稱正則判斷
if( ! preg_match('/^['.$this->product_name_rule.']+$/i', $items['name'])) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(name)_invalid");
}
return FALSE;
}
//去除物品單價左零及非數(shù)字(帶小數(shù)點)字符
$items['price'] = trim(preg_replace('/([^0-9\.])/i', '', $items['price']));
$items['price'] = trim(preg_replace('/^([0]+)/i', '', $items['price']));
//如果物品單價非數(shù)字
if( ! is_numeric($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']);
}
//加入物品到購物車
unset($this->_cart_contents[$rowid]);
$this->_cart_contents[$rowid]['rowid'] = $rowid;
foreach($items as $key => $val) {
$this->_cart_contents[$rowid][$key] = $val;
}
return TRUE;
}
/**
* 更新購物車物品信息(私有)
*
* @access private
* @param array
* @return bool
*/
private function _update($items = array()) {
//輸入物品參數(shù)異常
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;
}
//去除物品數(shù)量左零及非數(shù)字字符
$items['qty'] = preg_replace('/([^0-9])/i', '', $items['qty']);
$items['qty'] = preg_replace('/^([0]+)/i', '', $items['qty']);
//如果物品數(shù)量非數(shù)字,對購物車不做任何處理!
if( ! is_numeric($items['qty'])) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(qty)_invalid");
}
return FALSE;
}
//如果購物車物品數(shù)量與需要更新的物品數(shù)量一致,則不需要更新
if($this->_cart_contents[$items['rowid']]['qty'] == $items['qty']) {
if($this->debug === TRUE) {
$this->_log("cart_items_data(qty)_equal");
}
return FALSE;
}
//如果需要更新的物品數(shù)量等于0,表示不需要這件物品,從購物車種清除
//否則修改購物車物品數(shù)量等于輸入的物品數(shù)量
if($items['qty'] == 0) {
unset($this->_cart_contents[$items['rowid']]);
} else {
$this->_cart_contents[$items['rowid']]['qty'] = $items['qty'];
}
return TRUE;
}
/**
* 保存購物車數(shù)據(jù)到session
*
* @access private
* @return bool
*/
private function _save_cart() {
//首先清除購物車總物品種類及總金額
unset($this->_cart_contents['total_items']);
unset($this->_cart_contents['cart_total']);
//然后遍歷數(shù)組統(tǒng)計物品種類及總金額
$total = 0;
foreach($this->_cart_contents as $key => $val) {
if( ! is_array($val) OR ! isset($val['price']) OR ! isset($val['qty'])) {
continue;
}
$total += ($val['price'] * $val['qty']);
//每種物品的總金額
$this->_cart_contents[$key]['subtotal'] = ($val['price'] * $val['qty']);
}
//設(shè)置購物車總物品種類及總金額
$this->_cart_contents['total_items'] = count($this->_cart_contents);
$this->_cart_contents['cart_total'] = $total;
//如果購物車的元素個數(shù)少于等于2,說明購物車為空
if(count($this->_cart_contents) <= 2) {
unset($_SESSION['cart_contents']);
return FALSE;
}
//保存購物車數(shù)據(jù)到session
$_SESSION['cart_contents'] = $this->_cart_contents;
return TRUE;
}
/**
* 日志記錄
*
* @access private
* @param string
* @return bool
*/
private function _log($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實例
?<?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*/
希望本文所述對大家的php程序設(shè)計有所贊助.PHP實例
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