php mysql购物车实现程序

(2015-05-10 21:31:00)

标签：

股票

分类：

PHP

简单容易理解。cookie存购物车ID，db存购物车数据。

http://www.111cn.net/phper/php/41958.htm

//购物车session的产生代码

if(! $session && ! $scid) {

$session = md5(uniqid(rand()));

SetCookie(scid, $session, time() + 14400);

}

class Cart { //开始购物车类

function check_item( $table, $session, $product) {

$query = SELECT * FROM $table WHERE session=' $session' AND

product=' $product' ;

$result = mysql_query( $query);

if(! $result) {

return 0;

}

$numRows = mysql_num_rows( $result);

if( $numRows == 0) {

return 0;

} else {

$row = mysql_fetch_object( $result);

return $row->quantity;

}

}

function add_item( $table, $session, $product, $quantity) {

$qty = $this->check_item( $table, $session, $product);

if( $qty == 0) {

$query = INSERT INTO $table (session, product, quantity) VALUES

;

$query .= (' $session', ' $product', ' $quantity') ;

mysql_query( $query);

} else {

$quantity += $qty; //若有，则在原有基础上增加数量

$query = UPDATE $table SET quantity=' $quantity' WHERE session='

$session' AND ;

$query .= product=' $product' ;

mysql_query( $query);

}

}

function delete_item( $table, $session, $product) {

$query = DELETE FROM $table WHERE session=' $session' AND product='

$product' ;

mysql_query( $query);

}

function modify_quantity( $table, $session, $product, $quantity)

{

$query = UPDATE $table SET quantity=' $quantity' WHERE session='

$session' ;

$query .= AND product=' $product' ;

mysql_query( $query);

}

function clear_cart( $table, $session) {

$query = DELETE FROM $table WHERE session=' $session' ;

mysql_query( $query);

}

function cart_total( $table, $session) {

$query = SELECT * FROM $table WHERE session=' $session' ;

$result = mysql_query( $query);

if(mysql_num_rows( $result) > 0) {

while( $row = mysql_fetch_object( $result)) {

$query = SELECT price FROM inventory WHERE product='

$row->product' ;

$invResult = mysql_query( $query);

$row_price = mysql_fetch_object( $invResult);

$total += ( $row_price->price * $row->quantity);

}

}

return $total; //返回总价钱

}

function display_contents( $table, $session) {

$count = 0;

$query = SELECT * FROM $table WHERE session=' $session' ORDER BY id

;

$result = mysql_query( $query);

while( $row = mysql_fetch_object( $result)) {

$query = SELECT * FROM inventory WHERE product=' $row->product'

;

$result_inv = mysql_query( $query);

$row_inventory = mysql_fetch_object( $result_inv);

$contents[product][ $count] = $row_inventory->product;

$contents[price][ $count] = $row_inventory->price;

$contents[quantity][ $count] = $row->quantity;

$contents[total][ $count] = ( $row_inventory->price *

$row->quantity);

$contents[description][ $count] =

$row_inventory->description;

$count++; //物品数量加一(即下一个物品)

}

$total = $this->cart_total( $table, $session);

$contents[final] = $total;

return $contents;

}

function num_items( $table, $session) {

$query = SELECT * FROM $table WHERE session=' $session' ;

$result = mysql_query( $query);

$num_rows = mysql_num_rows( $result);

return $num_rows;

}

function quant_items( $table, $session) {

$quant = 0;// 物品总量

$query = SELECT * FROM $table WHERE session=' $session' ;

$result = mysql_query( $query);

while( $row = mysql_fetch_object( $result)) {

$quant += $row->quantity; //该物品数量加到总量里去

}

return $quant; //返回总量

}

}

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