這篇文章主要介紹了php實現(xiàn)仿寫CodeIgniter的購物車類,較為詳細的分析了購物車的功能與具體實現(xiàn)技巧,具有一定參考借鑒價值,需要的朋友可以參考下
本文實例講述了php實現(xiàn)仿寫CodeIgniter的購物車類。分享給大家供大家參考。具體如下:
這里仿寫CodeIgniter的購物車類
購物車基本功能:
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
cart.php文件如下:
- <?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) {
- //$this->_log("cart_create_success");
- }
- }
- /**
- * 將物品加入購物車
- *
- * @access public
- * @param array 一維或多維數(shù)組,必須包含鍵值名:
- id -> 物品ID標(biāo)識,
- qty -> 數(shù)量(quantity),
- price -> 單價(price),
- name -> 物品姓名
- * @return bool
- */
- public function insert($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) {
- $save_cart = TRUE;
- }
- }
- }
- }
- //當(dāng)插入成功后保存數(shù)據(jù)到session
- if($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) {
- $save_cart = TRUE;
- }
- }
- }
- }
- //當(dāng)更新成功后保存數(shù)據(jù)到session
- if($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*/
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*/
希望本文所述對大家的php程序設(shè)計有所幫助。
新聞熱點
疑難解答