本文实例讲述了PHP实现的比较完善的购物车类。分享给大家供大家参考。具体实现方法如下:
前不久做到一个项目需要用到购物车,考虑到可能经常用到,所以把它封装成一个类,以便以后调用,感兴趣的读者可以简单的把这个类稍微修改一下就可以用在自己的程序里了.
/* */
/* file type: 包含文件,建议后缀为.inc */
/* */
/* file name: cart.inc */
/* */
/* Description: 定义一个购车类 */
/* */
/* Func list : class cart */
/* */
/* author : bigeagle */
/* */
/* */
/*****************************************************************************/
//定义本文件常量
define("_CART_INC_" , "exists") ;
/*购物车类*/
class TCart
{
var $SortCount; //商品种类数
var $TotalCost; //商品总价值
var $Id; //每类商品的ID(数组)
var $Name; //每类商品的名称(数组)
var $Price; //每类商品的价格(数组)
var $Discount; //商品的折扣(数组)
var $GoodPrice ; //商品的优惠价格(数组)
var $Count; //每类商品的件数(数组)
var $MaxCount ; //商品限量(数组)
//******构造函数
function TCart()
{
$this->SortCount=0;
session_start(); //初始化一个session
session_register('sId');
session_register('sName');
session_register('sPrice');
session_register('sDiscount');
session_register('sGoodPrice') ;
session_register('sCount') ;
session_register('sMaxCount') ;
$this->Update();
$this->Calculate();
}
//********私有,根据session的值更新类中相应数据
function Update()
{
global $sId,$sName,$sPrice,$sCount,$sDiscount,$sMaxCount,$sGoodPrice;
if(!isset($sId) or !isset($sName) or !isset($sPrice)
or !isset($sDiscount) or !isset($sMaxCount)
or !isset($sGoodPrice) or !isset($sCount)) return;
$this->Id =$sId;
$this->Name =$sName;
$this->Price =$sPrice;
$this->Count =$sCount;
$this->Discount = $sDiscount ;
$this->GoodPrice = $sGoodPrice ;
$this->MaxCount = $sMaxCount ;
//计算商品总数
$this->SortCount=count($sId);
}
//********私有,根据新的数据计算每类商品的价值及全部商品的总价
function Calculate()
{
for($i=0;$iSortCount;$i++)
{
/*计算每件商品的价值,如果折扣是0 ,则为优惠价格*/
$GiftPrice = ($this->Discount[$i] == 0 ? $this->GoodPrice :
ceil($this->Price[$i] * $this->Discount[$i])/100 );
$this->TotalCost += $GiftPrice * $this->Count[$i] ;
}
}
//**************以下为接口函数
//*** 加一件商品
// 判断是否蓝中已有,如有,加count,否则加一个新商品
//首先都是改session的值,然后再调用update() and calculate()来更新成员变量
function Add($a_ID , $a_Name , $a_Price , $a_Discount ,
$a_GoodPrice , $a_MaxCount , $a_Count)
{
global $sId , $sName , $sCount , $sPrice , $sDiscount ,
$sGoodPrice , $sMaxCount ;
$k=count($sId);
for ($i=0; $i { //先找一下是否已经加入了这种商品
if($sId[$i]==$a_ID)
{
$sCount[$i] += $a_Count ;
break;
}
}
if($i >= $k)
{ //没有则加一个新商品种类
$sId[] = $a_ID;
$sName[] = $a_Name;
$sPrice[] = $a_Price;
$sCount[] = $a_Count;
$sGoodPrice[] = $a_GoodPrice ;
$sDiscount[] = $a_Discount ;
$sMaxCount[] = $a_MaxCount ;
}
$this->Update(); //更新一下类的成员数据
$this->Calculate();
}
//移去一件商品
function Remove($a_ID)
{
global $sId , $sName , $sCount , $sPrice , $sDiscount ,
$sGoodPrice , $sMaxCount ;
$k = count($sId);
for($i=0; $i {
if($sId[$i] == $a_ID)
{
$sCount[$i] = 0 ;
break;
}
}
$this->Update();
$this->Calculate();
}
//改变商品的个数
function ModifyCount($a_i,$a_Count)
{
global $sCount;
$sCount[$a_i] = $a_Count ;
$this->Update();
$this->Calculate();
}
/***************************
清空所有的商品
*****************************/
function RemoveAll()
{
session_unregister('sId');
session_unregister('sName');
session_unregister('sPrice');
session_unregister('sDiscount');
session_unregister('sGoodPrice') ;
session_unregister('sCount') ;
session_unregister('sMaxCount') ;
$this->SortCount = 0 ;
$this->TotalCost = 0 ;
}
//是否某件商品已在蓝内,参数为此商品的ID
function Exists($a_ID)
{
for($i=0; $iSortCount; $i++)
{
if($this->Id[$i]==$a_ID) return TRUE;
}
return FALSE;
}
//某件商品在蓝内的位置
function IndexOf($a_ID)
{
for($i=0; $iSortCount; $i++)
{
if($this->Id[$i]==$id) return $i;
}
return 0;
}
//取一件商品的信息,主要的工作函数
//返回一个关联数组,
function Item($i)
{
$Result[id] = $this->Id[$i];
$Result[name] = $this->Name[$i];
$Result[price] = $this->Price[$i];
$Result[count] = $this->Count[$i];
$Result[discount] = $this->Discount[$i] ;
$Result[goodprice] = $this->GoodPrice[$i] ;
$Result[maxcount] = $this->MaxCount[i] ;
return $Result;
}
//取总的商品种类数
function CartCount()
{
return $this->SortCount;
}
//取总的商品价值
function GetTotalCost()
{
return $this->TotalCost;
}
}
?>
希望本文所述对大家的PHP程序设计有所帮助。

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

Zend Studio 13.0.1
Powerful PHP integrated development environment

SublimeText3 English version
Recommended: Win version, supports code prompts!

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool