Examples of shopping cart classes implemented in PHP

This article illustrates the shopping cart class implemented by PHP. Share to everyone for your reference. The specific analysis is as follows:

The shopping cart class is based on the codeigniter of the shopping cart class.

The basic function of shopping cart is as follows:

1 Add items to the shopping cart
2 Remove items from the shopping cart
3 Update Shopping Cart items Information "+1/-1"
4 The shopping cart items for statistics
1. General Projects
2. Total Quantity
3. Total Amount
5 The number of items and the amount of shopping item statistics
6) Empty the shopping cart

1. cart.php Documents:

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<?php/** * * @author Quanshuidingdang * * * class Cart {//item ID and name rules, debug information control private $product _id_rule = '. A-z0-9-_ ';//Small Write Letters | number |. _-private $product _name_rule = '.: A-z0-9-_ ';//Small Letter | number |. _-: Private $debug = TRUE; Shopping cart Private $_cart_contents = array (); /** * Constructor * * @param array/Public function __construct () {//is used for the first time? if (Isset ($_session[' cart_contents ')) {$this-&G t;_cart_contents = $_session[' cart_contents ']; else {$this->_cart_contents[' cart_total '] = 0; $this->_cart_contents[' total_items ' = 0;} if ($this->debug = = = TRUE) {//$this->_log ("cart_create_success");}} /** * Add Items to Cart * * @access public * @param array one-dimensional or multidimensional array, must contain the key value name: ID-> item ID identification, QTY-> Quantity (quantity), Price-> ASP ( Price), name-> item names * @return BOOL */Public Function Insert ($items = Array ()) {//input item parameter exception if (! Is_array ($items) OR Count ($items) = = 0) {if ($this->debug = = TRUE) {$this->_log ("Cart_no_items_insert");} return FALSE;}//Item parameter handling $s Ave_cart = FALSE; if (Isset ($items [' id ']) {if ($this->_insert ($items) = = True) {$save _cart = TRUE;}} else {foreach ($items as $val) {if Is_ar Ray ($val) and Isset ($val [' ID '])) {if ($this->_insert ($val) = = True) {$save _cart = True;}}} ///When the insert succeeds save the data to session if ($save _cart) {$this->_save_cart (), return TRUE; /** * Update Shopping cart Article information * @access public * @param array * @return BOOL/Public Function update ($items = Array ()) {//input item parameter vary Constant if (!is_array ($items) OR count ($items) = = 0) {if ($this->debug = = TRUE) {$this->_log ("Cart_no_items_insert");} return FALSE; }//Item parameter processing $save _cart = FALSE; if (Isset ($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 ($this->_update ($va L) = = = True) {$save _cart = true;}} If the update succeeds, save the data to session if ($save _cart) {$this->_save_cart (), return TRUE, return FALSE; /** * Get the total amount of shopping cart items ** @return Int/Public Function total () {return $this->_cart_contents[' cart_total '];}/** * Get cart Item Type * * @return in T/Public Function Total_items () {return $this->_cart_contents[' Total_items '];/** * Get cart * * @return Array/PU Blic function contents () {return $this->_cart_contents;}/** * Get shopping cart items Options * * @param string * @return Array/PU Blic function Options ($rowid = ') {if ($this->has_options ($rowid)) {return $this->_cart_contents[$rowid] [' Options ']; else {return array ();}} /** * Empty 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 if shopping cart items have options option * * @param string * @return bool/Private Function has_options ($rowid = ") {if (! Isset) ($t his->_cart_contents[$rowid] [' Options ']] OR count ($this->_cart_contents[$rowid [' options ']) = = 0) {return FALSE; return TRUE; /** * Insert Data * * @accESS Private * @param array * @return BOOL/Private Function _insert ($items = Array ()) {//input item parameter exception if (! Is_array ($items ) OR count ($items) = = 0) {if ($this->debug = = TRUE) {$this->_log ("Cart_no_data_insert");} return FALSE;///If Item parameters Invalid number (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 item quantity left 0 and non-digit character $ items[' qty '] = Trim (Preg_replace ('/([^0-9])/I ', ', $items [' qty '])); $items [' qty '] = Trim (Preg_replace ('/^ ([0]+)/I ', ', $items [' qty '])); If the item quantity is 0, or not the number, then we do not have to do any processing to the shopping cart! if (! is_numeric ($items [' qty ']) OR $items [' qty '] = = 0) {if ($this->debug = = TRUE) {$this->_log ("Cart_items_data" (qt y) _invalid "); return FALSE; }//item ID is judged if (! Preg_match ('/^['. $this->product_id_rule. ') +$/i ', $items [' id ']) {if ($this->debug = = TRUE) {$this->_log ("Cart_items_data (ID) _invalid"); The name of the item isThen judge if (! Preg_match ('/^['. $this->product_name_rule. ') +$/i ', $items [' name ']) {if ($this->debug = = TRUE) {$this->_log ("Cart_items_data (name) _invalid"); ; //Remove Item unit price left 0 and Non-numeric (with decimal points) character $items [' prices '] = Trim (Preg_replace ('/([^0-9.]) /I ', ', $items [' Price ']]); $items [' price '] = Trim (Preg_replace ('/^ ([0]+)/I ', ', $items [' Price ']); If the item unit price is not a digital if (! is_numeric ($items [' prices ']) {if ($this->debug = = TRUE) {$this->_log ("Cart_items_data") Invalid "); return FALSE; }//Generate unique ID if (isset ($items [' Options ']) and count ($items [' Options ']) >0 {$rowid = MD5 ($items [' ID '].implode (', $ items[' options ']); else {$rowid = MD5 ($items [' id ']);}//Add items to Cart unset ($this->_cart_contents[$rowid]); $this->_cart_contents[$rowid] [' rowid '] = $rowid; foreach ($items as $key => $val) {$this->_cart_contents[$rowid] [$key] = $val;} return TRUE; /** * Update Shopping Cart article information (private) * @access private * @param array * @return BOOL/Private Function _update ($items = Array ()) {//input Item parameter exception 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 the number of items left 0 and non-numeric $items [' qty '] = preg_replace ('/[[^0-9])/I ', ', $items [' qty ']); $items [' qty '] = preg_replace ('/^ ([0]+)/I ', ', $items [' qty ']); If the number of items is not digital, do not do any processing on the shopping cart! if (! is_numeric ($items [' qty ']) {if ($this->debug = = TRUE) {$this->_log ("Cart_items_data (qty) _invalid");} return FALSE; If the number of shopping cart items is consistent with the number of items that need to be updated, you do not need to update the IF ($this->_cart_contents[$items [' rowID ']][' qty '] = = $items [' qty ']) {if ($this- >debug = = TRUE) {$this->_log ("Cart_items_data (qty) _equal"); //If you need to update the number of items equal to 0, indicating that you do not need this item, from the shopping cart type to clear/or modify the number of shopping cart items equal to the number of items entered if ($items [' qty '] = = 0) {unset ($this->_cart_contents[$ items[' rowID ']); else {$this->_cart_contents[$items [' rowID ']][' qty '] = $items [' qty '];} return TRUE; /** * Save CART Data to Session * @access private * @return bool/privAte function _save_cart () {///First Clear Cart Total item type and total amount unset ($this->_cart_contents[' total_items '); unset ($this->_cart _contents[' cart_total ']); Then iterate over the array of categories of items and the 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 type and total amount of the cart $this->_cart_contents[' total_items '] = count ($this->_cart_contents); $this->_cart_contents[' cart_total '] = $total; If the number of elements in the shopping cart is less than 2, the shopping cart is empty if (count ($this->_cart_contents) <= 2) {unset ($_session[' cart_contents ')); FALSE; //Save CART Data to session $_session[' cart_contents ' = $this->_cart_contents; return TRUE; /** * Log Record * @access private * @param string * @return bool/Private Function _log ($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 document reads as follows:

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<?php session_start (); Require_once (' cart.php '); $items = Array (0 => array (' ID ' => ' sp001 ', ' qty ' =>, ' price ' => ' 10.50 ', ' name ' => ' a002 ', ' options ' = > Array (' Made ' => ', ' => ', ' Company ', ' BGI ')), 1 => array (' ID ' => ' sp002 ', ' qty ' => ', ' the ', ' ", ', '), ' Price =&G ' T ' 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 help you with your PHP program design.