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這篇文章主要介紹php如何實(shí)現(xiàn)仿寫CodeIgniter的購(gòu)物車類,文中介紹的非常詳細(xì),具有一定的參考價(jià)值,感興趣的小伙伴們一定要看完!
具體如下:
這里仿寫CodeIgniter的購(gòu)物車類
購(gòu)物車基本功能:
1) 將物品加入購(gòu)物車
2) 從購(gòu)物車中刪除物品
3) 更新購(gòu)物車物品信息 【+1/-1】
4) 對(duì)購(gòu)物車物品進(jìn)行統(tǒng)計(jì)
1. 總項(xiàng)目
2. 總數(shù)量
3. 總金額
5) 對(duì)購(gòu)物單項(xiàng)物品的數(shù)量及金額進(jìn)行統(tǒng)計(jì)
6) 清空購(gòu)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(gòu)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) { //$this->_log("cart_create_success"); } } /** * 將物品加入購(gòu)物車 * * @access public * @param array 一維或多維數(shù)組,必須包含鍵值名: id -> 物品ID標(biāo)識(shí), qty -> 數(shù)量(quantity), price -> 單價(jià)(price), name -> 物品姓名 * @return bool */ public function insert($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) { $this->_save_cart(); return TRUE; } return FALSE; } /** * 更新購(gòu)物車物品信息 * * @access public * @param array * @return bool */ public function update($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(gòu)物車物品總金額 * * @return int */ public function total() { return $this->_cart_contents['cart_total']; } /** * 獲取購(gòu)物車物品種類 * * @return int */ public function total_items() { return $this->_cart_contents['total_items']; } /** * 獲取購(gòu)物車 * * @return array */ public function contents() { return $this->_cart_contents; } /** * 獲取購(gòu)物車物品options * * @param string * @return array */ public function options($rowid = '') { if($this->has_options($rowid)) { return $this->_cart_contents[$rowid]['options']; } else { return array(); } } /** * 清空購(gòu)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(gòu)物車物品是否有options選項(xiàng) * * @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) { $this->_log("cart_no_data_insert"); } return FALSE; } //如果物品參數(shù)無(wú)效(無(wú)id/qty/price/name) if( ! isset($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', '', $items['qty'])); //如果物品數(shù)量為0,或非數(shù)字,則我們對(duì)購(gòu)物車不做任何處理! if( ! is_numeric($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(jià)左零及非數(shù)字(帶小數(shù)點(diǎn))字符 $items['price'] = trim(preg_replace('/([^0-9\.])/i', '', $items['price'])); $items['price'] = trim(preg_replace('/^([0]+)/i', '', $items['price'])); //如果物品單價(jià)非數(shù)字 if( ! is_numeric($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(gòu)物車 unset($this->_cart_contents[$rowid]); $this->_cart_contents[$rowid]['rowid'] = $rowid; foreach($items as $key => $val) { $this->_cart_contents[$rowid][$key] = $val; } return TRUE; } /** * 更新購(gòu)物車物品信息(私有) * * @access private * @param array * @return bool */ private function _update($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', '', $items['qty']); //如果物品數(shù)量非數(shù)字,對(duì)購(gòu)物車不做任何處理! if( ! is_numeric($items['qty'])) { if($this->debug === TRUE) { $this->_log("cart_items_data(qty)_invalid"); } return FALSE; } //如果購(gòu)物車物品數(shù)量與需要更新的物品數(shù)量一致,則不需要更新 if($this->_cart_contents[$items['rowid']]['qty'] == $items['qty']) { if($this->debug === TRUE) { $this->_log("cart_items_data(qty)_equal"); } return FALSE; } //如果需要更新的物品數(shù)量等于0,表示不需要這件物品,從購(gòu)物車種清除 //否則修改購(gòu)物車物品數(shù)量等于輸入的物品數(shù)量 if($items['qty'] == 0) { unset($this->_cart_contents[$items['rowid']]); } else { $this->_cart_contents[$items['rowid']]['qty'] = $items['qty']; } return TRUE; } /** * 保存購(gòu)物車數(shù)據(jù)到session * * @access private * @return bool */ private function _save_cart() { //首先清除購(gòu)物車總物品種類及總金額 unset($this->_cart_contents['total_items']); unset($this->_cart_contents['cart_total']); //然后遍歷數(shù)組統(tǒng)計(jì)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(gòu)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'] = $total; //如果購(gòu)物車的元素個(gè)數(shù)少于等于2,說(shuō)明購(gòu)物車為空 if(count($this->_cart_contents) <= 2) { unset($_SESSION['cart_contents']); return FALSE; } //保存購(gòu)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*/
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