Example of shopping cart class implemented in PHP_PHP tutorial

Example of shopping cart class implemented in PHP

This article describes the example of shopping cart class implemented in PHP. Share it with everyone for your reference. The specific analysis is as follows:

This shopping cart class is implemented based on CodeIgniter’s shopping cart class imitation.

The basic functions of the shopping cart are as follows:

1) Add items to shopping cart
2) Delete items from shopping cart
3) Update shopping cart item information [1/-1]
4) Statistics of shopping cart items
1. Total Project
2. Total quantity
3. Total amount
5) Calculate the quantity and amount of individual shopping items
6) Clear shopping cart

1. cart.php file:

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 /** * * @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 $_cart_contents = array(); /** * Constructor * * @param array */ public function __construct() { //是否第一次使用? if(isset($_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) { //$this->_log("cart_create_success"); } } /** * Add items to cart * * @access public * @param array One-dimensional or multi-dimensional array, must contain key value name: id -> Item ID, qty -> quantity, price -> unit price (price), name -> Item name * @return bool */ public function insert($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) { $this->_save_cart(); return TRUE; } return FALSE; } /** * Update shopping cart item information * * @access public * @param array * @return bool */ public function update($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; } /** * Get the total amount of items in the shopping cart * * @return int */ public function total() { return $this->_cart_contents['cart_total']; } /** * Get shopping cart item type * * @return int */ public function total_items() { return $this->_cart_contents['total_items']; } /** * Get shopping cart * * @return array */ public function contents() { return $this->_cart_contents; } /** * Get shopping cart item options * * @param string * @return array */ public function options($rowid = '') { if($this->has_options($rowid)) { return $this->_cart_contents[$rowid]['options']; } else { return array(); } } /** * Clear shopping cart * */ public function destroy() { unset($this->_cart_contents); $this->_cart_contents['cart_total'] = 0; $this->_cart_contents['total_items'] = 0; unset($_SESSION['cart_contents']); } /** * Determine whether the shopping cart items have options * * @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()) { //Abnormal input item parameters if( ! is_array($items) OR count($items) == 0) { if($this->debug === TRUE) { $this->_log("cart_no_data_insert"); } return FALSE; } //If the item parameters are invalid (no id/qty/price/name) if( ! isset($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; } //Remove left zero and non-numeric characters from item quantity $items['qty'] = trim(preg_replace('/([^0-9])/i', '', $items['qty'])); $items['qty'] = trim(preg_replace('/^([0] )/i', '', $items['qty'])); //If the item quantity is 0, or non-number, we will not do anything with the shopping cart! if( ! is_numeric($items['qty']) OR $items['qty'] == 0) { if($this->debug === TRUE) { $this->_log("cart_items_data(qty)_invalid"); } return FALSE; } //Item ID regular judgment if( ! preg_match('/^['.$this->product_id_rule.'] $/i', $items['id'])) { if($this->debug === TRUE) { $this->_log("cart_items_data(id)_invalid"); } return FALSE; } //Regular judgment of item name if( ! preg_match('/^['.$this->product_name_rule.'] $/i', $items['name'])) { if($this->debug === TRUE) { $this->_log("cart_items_data(name)_invalid"); } return FALSE; } //Remove the left zero and non-numeric (with decimal point) characters from the unit price of the item $items['price'] = trim(preg_replace('/([^0-9.])/i', '', $items['price'])); $items['price'] = trim(preg_replace('/^([0] )/i', '', $items['price'])); //If the unit price of the item is not a number if( ! is_numeric($items['price'])) { if($this->debug === TRUE) { $this->_log("cart_items_data(price)_invalid"); } return FALSE; } //Generate the unique id of the item if(isset($items['options']) AND count($items['options']) >0) { $rowid = md5($items['id'].implode('', $items['options'])); } else { $rowid = md5($items['id']); } //Add items to shopping cart unset($this->_cart_contents[$rowid]); $this->_cart_contents[$rowid]['rowid'] = $rowid; foreach($items as $key => $val) { $this->_cart_contents[$rowid][$key] = $val; } return TRUE; } /** * Update shopping cart item information (private) * * @access private * @param array * @return bool */ private function _update($items = array()) { //Abnormal input item parameters 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; } //Remove left zero and non-numeric characters from item quantity $items['qty'] = preg_replace('/([^0-9])/i', '', $items['qty']); $items['qty'] = preg_replace('/^([0] )/i', '', $items['qty']); //If the item quantity is non-numeric, no processing will be done to the shopping cart! if( ! is_numeric($items['qty'])) { if($this->debug === TRUE) { $this->_log("cart_items_data(qty)_invalid"); } return FALSE; } //If the number of items in the shopping cart is consistent with the number of items that need to be updated, no update is required if($this->_cart_contents[$items['rowid']]['qty'] == $items['qty']) { if($this->debug === TRUE) { $this->_log("cart_items_data(qty)_equal"); } return FALSE; } //If the number of items that need to be updated is equal to 0, it means that this item is not needed and should be removed from the shopping cart // Otherwise, modify the number of items in the shopping cart to be equal to the number of items entered if($items['qty'] == 0) { unset($this->_cart_contents[$items['rowid']]); } else { $this->_cart_contents[$items['rowid']]['qty'] = $items['qty']; } return TRUE; } /** * Save shopping cart data to session * * @access private * @return bool */ private function _save_cart() { //First clear the total item types and total amount in the shopping cart unset($this->_cart_contents['total_items']); unset($this->_cart_contents['cart_total']); //Then traverse the array to count the item types and total amount $total = 0; foreach($this->_cart_contents as $key => $val) { if( ! is_array($val) OR ! isset($val['price']) OR ! isset($val['qty'])) { continue; } $total = ($val['price'] * $val['qty']); //The total amount of each item $this->_cart_contents[$key]['subtotal'] = ($val['price'] * $val['qty']); } //Set the total item types and total amount in the shopping cart $this->_cart_contents['total_items'] = count($this->_cart_contents); $this->_cart_contents['cart_total'] = $total; //If the number of elements in the shopping cart is less than or equal to 2, the shopping cart is empty if(count($this->_cart_contents) <= 2) { unset($_SESSION['cart_contents']); return FALSE; } //Save shopping cart data to session $_SESSION['cart_contents'] = $this->_cart_contents; return TRUE; } /** * Logging * * @access private * @param string * @return bool */ private function _log($msg) { return @file_put_contents('cart_err.log', $msg, FILE_APPEND); } } /*End of file cart.php*/ /*Location /htdocs/cart.php*/

2. The cart_demo.php file is as follows:

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 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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 <🎜>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*/

I hope this article will be helpful to everyone’s PHP programming design. http://www.bkjia.com/PHPjc/1017839.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1017839.htmlTechArticleExample of Shopping Cart Class Implemented by PHP This article describes the shopping cart class implemented by PHP. Share it with everyone for your reference. The specific analysis is as follows: This shopping cart class is a shopping cart class based on CodeIgniter...