php購物車數據庫原理,php購物車及訂單思路

本文目錄一覽：

• 1、請教關於PHP購物車代碼的數據庫表和字段
• 2、php關於用數據庫作為購物車的原理
• 3、php session實現購物車的原理
• 4、網站購物車是怎麼個原理。對數據庫表配哪些字段想不明白。請假大俠們。
• 5、PHP中用json實現購物車功能，怎麼實現
• 6、php 實現 購物車 提交到 訂單的數據庫

請教關於PHP購物車代碼的數據庫表和字段

PHP Code

div id=”products-wrapper”

h1Products/h1

div class=”products”

?php

//current URL of the Page. cart_update.php redirects back to this URL

$current_url = base64_encode($url=”http://”.$_SERVER[‘HTTP_HOST’].$_SERVER[‘REQUEST_URI’]);

$results = $mysqli-query(“SELECT * FROM cart ORDER BY id ASC”);

if ($results) {

//fetch results set as object and output HTML

while($obj = $results-fetch_object())

{

echo ‘div class=”product”‘;

echo ‘form method=”post” action=”cart_update.php”‘;

echo ‘div class=”product-thumb”img src=”images/’.$obj-product_img_name.'”/div’;

echo ‘div class=”product-content”h3’.$obj-product_name.’/h3′;

echo ‘div class=”product-desc”‘.$obj-product_desc.’/div’;

echo ‘div class=”product-info”‘;

echo ‘Price ‘.$currency.$obj-price.’ | ‘;

echo ‘Qty input type=”text” name=”product_qty” value=”1″ size=”3″ /’;

echo ‘button class=”add_to_cart”Add To Cart/button’;

echo ‘/div/div’;

echo ‘input type=”hidden” name=”product_code” value=”‘.$obj-product_code.'” /’;

echo ‘input type=”hidden” name=”type” value=”add” /’;

echo ‘input type=”hidden” name=”return_url” value=”‘.$current_url.'” /’;

echo ‘/form’;

echo ‘/div’;

}

}

?

/div

div class=”shopping-cart”

h2Your Shopping Cart/h2

?php

if(isset($_SESSION[“products”]))

{

$total = 0;

echo ‘ol’;

foreach ($_SESSION[“products”] as $cart_itm)

{

echo ‘li class=”cart-itm”‘;

echo ‘span class=”remove-itm”a href=”cart_update.php?removep=’.$cart_itm[“code”].’return_url=’.$current_url.'”×/a/span’;

echo ‘h3’.$cart_itm[“name”].’/h3′;

echo ‘div class=”p-code”P code : ‘.$cart_itm[“code”].’/div’;

echo ‘div class=”p-qty”Qty : ‘.$cart_itm[“qty”].’/div’;

echo ‘div class=”p-price”Price :’.$currency.$cart_itm[“price”].’/div’;

echo ‘/li’;

$subtotal = ($cart_itm[“price”]*$cart_itm[“qty”]);

$total = ($total + $subtotal);

}

echo ‘/ol’;

echo ‘span class=”check-out-txt”strongTotal : ‘.$currency.$total.’/strong a href=”view_cart.php”Check-out!/a/span’;

echo ‘span class=”empty-cart”a href=”cart_update.php?emptycart=1return_url=’.$current_url.'”Empty Cart/a/span’;

}else{

echo ‘Your Cart is empty’;

}

?

/div

cart_update.php

PHP Code

?php

session_start();

include_once(“config.php”);

//empty cart by distroying current session

if(isset($_GET[“emptycart”]) $_GET[“emptycart”]==1)

{

$return_url = base64_decode($_GET[“return_url”]); //return url

session_destroy();

header(‘Location:’.$return_url);

}

//add item in shopping cart

if(isset($_POST[“type”]) $_POST[“type”]==’add’)

{

$product_code = filter_var($_POST[“product_code”], FILTER_SANITIZE_STRING); //product code

$product_qty = filter_var($_POST[“product_qty”], FILTER_SANITIZE_NUMBER_INT); //product code

$return_url = base64_decode($_POST[“return_url”]); //return url

//limit quantity for single product

if($product_qty 10){

die(‘div align=”center”This demo does not allowed more than 10 quantity!br /a href=””Back To Products/a./div’);

}

//MySqli query – get details of item from db using product code

$results = $mysqli-query(“SELECT product_name,price FROM cart WHERE product_code=’$product_code’ LIMIT 1”);

$obj = $results-fetch_object();

if ($results) { //we have the product info

//prepare array for the session variable

$new_product = array(array(‘name’=$obj-product_name, ‘code’=$product_code, ‘qty’=$product_qty, ‘price’=$obj-price));

if(isset($_SESSION[“products”])) //if we have the session

{

$found = false; //set found item to false

foreach ($_SESSION[“products”] as $cart_itm) //loop through session array

{

if($cart_itm[“code”] == $product_code){ //the item exist in array

$product[] = array(‘name’=$cart_itm[“name”], ‘code’=$cart_itm[“code”], ‘qty’=$product_qty, ‘price’=$cart_itm[“price”]);

$found = true;

}else{

//item doesn’t exist in the list, just retrive old info and prepare array for session var

$product[] = array(‘name’=$cart_itm[“name”], ‘code’=$cart_itm[“code”], ‘qty’=$cart_itm[“qty”], ‘price’=$cart_itm[“price”]);

}

}

if($found == false) //we didn’t find item in array

{

//add new user item in array

$_SESSION[“products”] = array_merge($product, $new_product);

}else{

//found user item in array list, and increased the quantity

$_SESSION[“products”] = $product;

}

}else{

//create a new session var if does not exist

$_SESSION[“products”] = $new_product;

}

}

//redirect back to original page

header(‘Location:’.$return_url);

}

//remove item from shopping cart

if(isset($_GET[“removep”]) isset($_GET[“return_url”]) isset($_SESSION[“products”]))

{

$product_code = $_GET[“removep”]; //get the product code to remove

$return_url = base64_decode($_GET[“return_url”]); //get return url

foreach ($_SESSION[“products”] as $cart_itm) //loop through session array var

{

if($cart_itm[“code”]!=$product_code){ //item does,t exist in the list

$product[] = array(‘name’=$cart_itm[“name”], ‘code’=$cart_itm[“code”], ‘qty’=$cart_itm[“qty”], ‘price’=$cart_itm[“price”]);

}

//create a new product list for cart

$_SESSION[“products”] = $product;

}

//redirect back to original page

header(‘Location:’.$return_url);

}

?

view_cart.php

PHP Code

div class=”view-cart”

?php

$current_url = base64_encode($url=”http://”.$_SERVER[‘HTTP_HOST’].$_SERVER[‘REQUEST_URI’]);

if(isset($_SESSION[“products”]))

{

$total = 0;

echo ‘form method=”post” action=”paypal-express-checkout/process.php”‘;

echo ‘ul’;

$cart_items = 0;

foreach ($_SESSION[“products”] as $cart_itm)

{

$product_code = $cart_itm[“code”];

$results = $mysqli-query(“SELECT product_name,product_desc, price FROM cart WHERE product_code=’$product_code’ LIMIT 1”);

$obj = $results-fetch_object();

echo ‘li class=”cart-itm”‘;

echo ‘span class=”remove-itm”a href=”cart_update.php?removep=’.$cart_itm[“code”].’return_url=’.$current_url.'”×/a/span’;

echo ‘div class=”p-price”‘.$currency.$obj-price.’/div’;

echo ‘div class=”product-info”‘;

echo ‘h3′.$obj-product_name.’ (Code :’.$product_code.’)/h3 ‘;

echo ‘div class=”p-qty”Qty : ‘.$cart_itm[“qty”].’/div’;

echo ‘div’.$obj-product_desc.’/div’;

echo ‘/div’;

echo ‘/li’;

$subtotal = ($cart_itm[“price”]*$cart_itm[“qty”]);

$total = ($total + $subtotal);

echo ‘input type=”hidden” name=”item_name[‘.$cart_items.’]” value=”‘.$obj-product_name.'” /’;

echo ‘input type=”hidden” name=”item_code[‘.$cart_items.’]” value=”‘.$product_code.'” /’;

echo ‘input type=”hidden” name=”item_desc[‘.$cart_items.’]” value=”‘.$obj-product_desc.'” /’;

echo ‘input type=”hidden” name=”item_qty[‘.$cart_items.’]” value=”‘.$cart_itm[“qty”].'” /’;

$cart_items ++;

}

echo ‘/ul’;

echo ‘span class=”check-out-txt”‘;

echo ‘strongTotal : ‘.$currency.$total.’/strong ‘;

echo ‘/span’;

echo ‘/form’;

}else{

echo ‘Your Cart is empty’;

}

?

/div

/div

php關於用數據庫作為購物車的原理

我來解答一下你的疑惑

買了兩個產品。那就是執行了兩次

insert

into

temp_table

(uid,productid,pnum,poneprice,ptotalprice)

如果

productid相同則，

pnum

=

pnum+1;

ptotalprice

=

pnum*poneprice

假設前提是

當前兩條記錄的產品不同，那麼購物車列表則是循環讀取temp_table列出現有符合條件之產品，數量，價格。

修改2個產品數量的時候，

提交後，同樣的文本框pnum為一個數組，productid為一個數組

獲取pnum,productid,並且用

split分析後，

分別update

update

temp_table

set

pnum='”.$pnum[0].”‘,ptotalprice=’..省略.’

where

uid=自己的uid

and

productid='”.$productid[0].”‘

注意，這裡數組下標要對應好，你可以用個循環。

最後，當訂單下好之後，要把臨時表的數據轉移到正式表中，並且清理掉當前這個用戶臨時表的內容即可。

php session實現購物車的原理

session_start;

然後原理就是，建立一個數組，$_SESSION[‘wupin’][]=選中的物品的ID，然後就可以了，如果用戶取消，就把他選擇取消的那個ID的鍵從數組裡刪除就行。

網站購物車是怎麼個原理。對數據庫表配哪些字段想不明白。請假大俠們。

第一：做購物車，一般來說是不存入數據庫這樣數據量比較大並且查詢效率慢，所以一般購物車都用Session,或Cookie來實現，建一個購物車實體類，大概有這些字段，商品ID，用戶ID，數量…等這可以根據自己需要來設置，然後比如購買一件商品添加到購物車就創建一個hashtable來保存購物車裡的信息，然後把hashtable保存到Session或Cookie，大致就這樣。

第二：訂單，你說的那個訂單一般都有一個訂單表的。首先要弄清楚流程，肯定是用戶先將產品加入購物車，然後再提交訂單的。為什麼會訂單下了以後還關購物車的事呢？購物車只是臨時保存用戶購買產品的地方。就像超市裡去賣東西首先推一個車，然後去選購你要的產品，最後付款。對應這車只是你保存東西的一個工具，當你購買完畢後就不會和他有什麼聯繫了。如果你後面需要退貨你也只管那張單據（對應產品訂單）而不會和你購物車車上聯繫。

不知道我這樣講你是否明白！

PHP中用json實現購物車功能，怎麼實現

購物車中至少包含 以下信息：

商品ID,商品名稱，商品價格，購買數量，（其他如果有）

把以上信息組成一個數組，

每購買一件商品，就生成一個這樣的數組，多個數組組成一個大數組，

然後將這個二維數組轉成JSON格式存入COOKIE即可。在購物車頁面加載時，讀取COOKIE內的這個JSON，然後再轉成數組輸出到頁面即可。

PHP數組轉JSON：json_encode

JSON轉數組：json_decode

php 實現 購物車 提交到 訂單的數據庫

用戶登陸後系統應該會分配一個session ： id，這個id應該是改用於的用戶表id。然後再做一個購物車的表，裡面可以只考慮存商品id、用戶id等關鍵信息；

當用戶提交購買的時候再做相關的操作，具體可以參考淘寶、天貓的購物車已經後續付款效果。