PHP購物車種，移植于CodeIgniter
Jun 13, 2016 am 10:39 AM
PHP購物車類，移植于CodeIgniter
<?php /** * 購物車程序 Modified by CodeIgniter * */class cart { // 對產(chǎn)品ID和產(chǎn)品名稱進(jìn)行正則驗(yàn)證屬性 var $product_id_rules = '\.a-z0-9_-'; var $product_name_rules = '\.\:\-_ a-z0-9'; // 考慮到漢字，該功能暫不使用 // 私有變量 var $_cart_contents = array(); /** * 構(gòu)造方法 * */ public function __construct() { if ($this->session('cart_contents') !== FALSE) { $this->_cart_contents = $this->session('cart_contents'); } else { // 初始化數(shù)據(jù) $this->_cart_contents['cart_total'] = 0; $this->_cart_contents['total_items'] = 0; } } // -------------------------------- /** * 添加到購物車 * * @access public * @param array * @return bool */ function insert($items = array()) { // 檢測數(shù)據(jù)是否正確 if ( ! is_array($items) OR count($items) == 0) { return FALSE; } // 可以添加一個商品（一維數(shù)組），也可以添加多個商品（二維數(shù)組） $save_cart = FALSE; if (isset($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) { $save_cart = TRUE; } } } } // 更新數(shù)據(jù) if ($save_cart == TRUE) { $this->_save_cart(); return TRUE; } return FALSE; } // -------------------------------- /** * 處理插入購物車數(shù)據(jù) * * @access private * @param array * @return bool */ function _insert($items = array()) { // 檢查購物車 if ( ! is_array($items) OR count($items) == 0) { return FALSE; } // -------------------------------- /* 前四個數(shù)組索引 (id, qty, price 和name) 是 必需的。 如果缺少其中的任何一個，數(shù)據(jù)將不會被保存到購物車中。 第5個索引 (options) 是可選的。當(dāng)你的商品包含一些相關(guān)的選項(xiàng)信息時，你就可以使用它。 請使用一個數(shù)組來保存選項(xiàng)信息。注意：$data['price'] 的值必須大于0 如：$data = array( 'id' => 'sku_123ABC', 'qty' => 1, 'price' => 39.95, 'name' => 'T-Shirt', 'options' => array('Size' => 'L', 'Color' => 'Red') ); */ if ( ! isset($items['id']) OR ! isset($items['qty']) OR ! isset($items['price']) OR ! isset($items['name'])) { return FALSE; } // -------------------------------- // 數(shù)量驗(yàn)證，不是數(shù)字替換為空 $items['qty'] = trim(preg_replace('/([^0-9])/i', '', $items['qty'])); // 數(shù)量驗(yàn)證 $items['qty'] = trim(preg_replace('/(^[0]+)/i', '', $items['qty'])); // 數(shù)量必須是數(shù)字或不為0 if ( ! is_numeric($items['qty']) OR $items['qty'] == 0) { return FALSE; } // -------------------------------- // 產(chǎn)品ID驗(yàn)證 if ( ! preg_match("/^[".$this->product_id_rules."]+$/i", $items['id'])) { return FALSE; } // -------------------------------- // 驗(yàn)證產(chǎn)品名稱，考慮到漢字，暫不使用 /* if ( ! preg_match("/^[".$this->product_name_rules."]+$/i", $items['name'])) { return FALSE; } */ // -------------------------------- // 價格驗(yàn)證 $items['price'] = trim(preg_replace('/([^0-9\.])/i', '', $items['price'])); $items['price'] = trim(preg_replace('/(^[0]+)/i', '', $items['price'])); // 驗(yàn)證價格是否是數(shù)值 if ( ! is_numeric($items['price'])) { return FALSE; } // -------------------------------- // 屬性驗(yàn)證，如果屬性存在，屬性值+產(chǎn)品ID進(jìn)行加密保存在$rowid中 if (isset($items['options']) AND count($items['options']) > 0) { $rowid = md5($items['id'].implode('', $items['options'])); } else { // 沒有屬性時直接對產(chǎn)品ID加密 $rowid = md5($items['id']); } // 檢測購物車中是否有該產(chǎn)品，如果有，在原來的基礎(chǔ)上加上本次新增的商品數(shù)量 $_contents = $this->_cart_contents; $_tmp_contents = array(); foreach ($_contents as $val) { if (is_array($val) AND isset($val['rowid']) AND isset($val['qty']) AND $val['rowid']==$rowid) { $_tmp_contents[$val['rowid']]['qty'] = $val['qty']; } else { $_tmp_contents[$val['rowid']]['qty'] = 0; } } // -------------------------------- // 清除原來的數(shù)據(jù) unset($this->_cart_contents[$rowid]); // 重新賦值 $this->_cart_contents[$rowid]['rowid'] = $rowid; // 添加新項(xiàng)目 foreach ($items as $key => $val) { if ($key=='qty' && isset($_tmp_contents[$rowid][$key])) { $this->_cart_contents[$rowid][$key] = $val+$_tmp_contents[$rowid][$key]; } else { $this->_cart_contents[$rowid][$key] = $val; } } return TRUE; } // -------------------------------- /** * 更新購物車 * * @access public * @param array * @param string * @return bool */ function update($items = array()) { // 驗(yàn)證 if ( ! is_array($items) OR count($items) == 0) { return FALSE; } $save_cart = FALSE; if (isset($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) { $save_cart = TRUE; } } } } if ($save_cart == TRUE) { $this->_save_cart(); return TRUE; } return FALSE; } // -------------------------------- /** * 處理更新購物車 * * @access private * @param array * @return bool */ function _update($items = array()) { if ( ! isset($items['qty']) OR ! isset($items['rowid']) OR ! isset($this->_cart_contents[$items['rowid']])) { return FALSE; } // 檢測數(shù)量 $items['qty'] = preg_replace('/([^0-9])/i', '', $items['qty']); if ( ! is_numeric($items['qty'])) { return FALSE; } if ($this->_cart_contents[$items['rowid']]['qty'] == $items['qty']) { return FALSE; } if ($items['qty'] == 0) { unset($this->_cart_contents[$items['rowid']]); } else { $this->_cart_contents[$items['rowid']]['qty'] = $items['qty']; } return TRUE; } // -------------------------------- /** * 保存購物車到Session里 * * @access private * @return bool */ function _save_cart() { unset($this->_cart_contents['total_items']); unset($this->_cart_contents['cart_total']); $total = 0; $items = 0; foreach ($this->_cart_contents as $key => $val) { if ( ! is_array($val) OR ! isset($val['price']) OR ! isset($val['qty'])) { continue; } $total += ($val['price'] * $val['qty']); $items += $val['qty']; $this->_cart_contents[$key]['subtotal'] = ($this->_cart_contents[$key]['price'] * $this->_cart_contents[$key]['qty']); } $this->_cart_contents['total_items'] = $items; $this->_cart_contents['cart_total'] = $total; if (count($this->_cart_contents) session('cart_contents', array()); return FALSE; } $this->session('cart_contents',$this->_cart_contents); return TRUE; } // -------------------------------- /** * 購物車中的總計(jì)金額 * * @access public * @return integer */ function total() { return $this->_cart_contents['cart_total']; } // -------------------------------- /** * 購物車中總共的項(xiàng)目數(shù)量 * * * @access public * @return integer */ function total_items() { return $this->_cart_contents['total_items']; } // -------------------------------- /** * 購物車中所有信息的數(shù)組 * * 返回一個包含了購物車中所有信息的數(shù)組 * * @access public * @return array */ function contents() { $cart = $this->_cart_contents; unset($cart['total_items']); unset($cart['cart_total']); return $cart; } // -------------------------------- /** * 購物車中是否有特定的列包含選項(xiàng)信息 * * 如果購物車中特定的列包含選項(xiàng)信息，本函數(shù)會返回 TRUE(布爾值)，本函數(shù)被設(shè)計(jì)為與 contents() 一起在循環(huán)中使用 * * @access public * @return array */ function has_options($rowid = '') { if ( ! isset($this->_cart_contents[$rowid]['options']) OR count($this->_cart_contents[$rowid]['options']) === 0) { return FALSE; } return TRUE; } // -------------------------------- /** * 以數(shù)組的形式返回特定商品的選項(xiàng)信息 * * 本函數(shù)被設(shè)計(jì)為與 contents() 一起在循環(huán)中使用 * * @access public * @return array */ function product_options($rowid = '') { if ( ! isset($this->_cart_contents[$rowid]['options'])) { return array(); } return $this->_cart_contents[$rowid]['options']; } // -------------------------------- /** * 格式化數(shù)值 * * 返回格式化后帶小數(shù)點(diǎn)的值（小數(shù)點(diǎn)后有2位），一般價格使用 * * @access public * @return integer */ function format_number($n = '') { if ($n == '') { return ''; } $n = trim(preg_replace('/([^0-9\.])/i', '', $n)); return number_format($n, 2, '.', ','); } // -------------------------------- /** * 銷毀購物車 * * 這個函數(shù)一般是在處理完用戶訂單后調(diào)用 * * @access public * @return null */ function destroy() { unset($this->_cart_contents); $this->_cart_contents['cart_total'] = 0; $this->_cart_contents['total_items'] = 0; $this->session('cart_contents', array()); } // -------------------------------- /** * 保存Session * * 須有session_start(); * * @access private * @return bool */ function session($name = 'cart_contents',$value = NULL) { if ($name=='') $name = 'cart_contents'; if ($value == NULL) { return @$_SESSION[$name]; } else { if (!empty($value) && is_array($value)) { $_SESSION[$name] = $value; return TRUE; } else { return FALSE; } } }}?>
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