データベースに接続するための関数とカートにCookieを設定するための関数の2つの関数を含むphpファイルがあります。そのファイルは次のとおりです。
<?php
$dbServer="localhost";
$dbName="test";
function ConnectToDb($server, $database){
$s=@mysql_connect($server);
$d=@mysql_select_db($database, $s);
if(!$s || !$d)
return false;
else
return true;
}
function GetCartId(){
if(isset($_COOKIE["cartId"])){
return $_COOKIE["cartId"];
}
else {
session_start();
setcookie("cartId", session_id(), time()+((3600*24)*30));
return session_id();
}
}
?>
データベースに接続するための関数は、この特定のプログラムの別のphpファイルでうまく機能します。このファイルで問題が発生しています:
<?php
include("db.php");
switch($_GET["action"]) {
case "add_item":
{
AddItem($_GET["id"], $_GET["qty"]);
ShowCart();
break;
}
case "update_item": {
UpdateItem($_GET["id"], $_GET["qty"]);
ShowCart();
break;
}
case "remove_item": {
RemoveItem($_GET["id"]);
ShowCart();
break;
}
default: {
ShowCart();
}
}
function AddItem($itemId, $qty) {
// Will check whether or not this item
// already exists in the cart table.
// If it does, the UpdateItem function
// will be called instead
$cxn = @ConnectToDb($dbServer, $dbName);
// Check if this item already exists in the users cart table
$result = mysql_query("select count(*) from cs368_cart where cookieID = '" . GetCartID() . "' and itemId = $itemId");
$row = mysql_fetch_row($result);
$numRows = $row[0];
if($numRows == 0) {
// This item doesn't exist in the users cart,
// we will add it with an insert query
@mysql_query("insert into cs368_cart(cookieID, itemId, qty) values('" . GetCartID() . "', $itemId, $qty)");
}
else {
// This item already exists in the users cart,
// we will update it instead
UpdateItem($itemId, $qty);
}
}
function UpdateItem($itemId, $qty) {
// Updates the quantity of an item in the users cart.
// If the qutnaity is zero, then RemoveItem will be
// called instead
$cxn = @ConnectToDb($dbServer, $dbName);
if($qty == 0) {
// Remove the item from the users cart
RemoveItem($itemId);
}
else {
mysql_query("update cs368_cart set qty = $qty where cookieID = '" . GetCartID() . "' and itemId = $itemId");
}
}
function RemoveItem($itemId) {
// Uses an SQL delete statement to remove an item from
// the users cart
$cxn = @ConnectToDb($dbServer, $dbName);
mysql_query("delete from cs368_cart where cookieID = '" . GetCartID() . "' and itemId = $itemId");
}
function ShowCart() {
// Gets each item from the cart table and display them in
// a tabulated format, as well as a final total for the cart
$cxn = @ConnectToDb($dbServer, $dbName);
$result = mysql_query("select * from cs368_cart inner join cs368_products on cart.itemId =
items.itemId where cart.cookieID = '" . GetCartID() . "' order by items.itemName asc")
or die("Query to get test in function ShowCart failed with error: ".mysql_error());
?>
この問題を解決するにはどうすればよいですか?ありがとう!