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私は自分のデータベースから引き出しているアイテムをユーザーが「カート」に追加する方法を理解しようとしています。データベースから項目をドロップダウンメニューに表示する方法はわかっていますが、項目を選択してカートに追加する方法については、データベースに何も挿入しなくても足りません。カートにデータベース項目を追加する
これは私が持っているものですが、動作させるのに苦労しています...どんなヘルプ？
<?
session_start();
setlocale(LC_MONETARY, 'en_US');
$product_id = $_POST['Select_Product'];
$action = $_POST['action'];
switch ($action) {
case "Add":
$_SESSION['cart'][$product_id] ++;
break;
case "Remove":
$_SESSION['cart'][$product_id] --;
if ($_SESSION['cart'][$product_id] <= 0)
unset($_SESSION['cart'][$product_id]);
break;
case "Empty":
unset($_SESSION['cart']);
break;
case "Info":
break;
}
require_once(''); //the database(taken out for security)
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Cart</title>
<script type="text/javascript" src="view.js"></script>
<script>
function productInfo(key) {
//creates the datafile with query string
var data_file = "AdventureCart.php?prodID=" + key;
//this is making the http request
var http_request = new XMLHttpRequest();
try {
// Opera 8.0+, Firefox, Chrome, Safari
http_request = new XMLHttpRequest();
} catch (e) {
// Internet Explorer Browsers
try {
http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
// Something went wrong
alert("Your browser broke!");
return false;
}
}
}
http_request.onreadystatechange = function() {
if (http_request.readyState == 4)
{
var text = http_request.responseText;
//this is adding the elements to the HTML in the page
document.getElementById("productInformation").innerHTML = text;
}
}
http_request.open("GET", data_file, true);
http_request.send();
}
</script>
<link href="/CSIS2440/CodeEx/view.css" rel="stylesheet" type="text/css">
</head>
<body>
<div class="form" id="form_container">
<form action="AdventureCart.php" method="Post">
<div>
<p><span class="text">Please Select a product:</span>
<select id="Select_Product" name="Select_Product" onchange="productInfo(this.value)" class="select">
<option value=""></option>
<?php
//setting the select statement and running it
$search = "SELECT * FROM AdventureGear order by Item";
$return = mysql_query($search);
if (!$return) {
$message = "Whole query " . $search;
echo $message;
die("Invalid query " . $mysql_error());
}
while ($row = mysql_fetch_array($return)){
if ($row['idAdventureGear'] == $product_id){
echo "<option value='" .$row['idAdventureGear'] . "'selected='selected'>"
. $row['Item'] . "</option>";
}else{
echo "<option value='" . $row['idAdventureGear'] . "'>"
. $row['Item'] . "</option>";
}
}
?>
</select></p>
<tr>
<td>
<input id="button_Add" type="submit" value="Add" name="Add" class="button"/>
</td>
<td>
<input name="action" type="submit" class="button" id="button_Remove" value="Remove"/>
</td>
<td>
<input name="action" type="submit" class="button" id="button_empty" value="Empty"/>
</td>
<td>
<input name="action" type="submit" class="button" id="button_Info" value="Info"/>
</td>
</tr>
</table>
</div>
<div id="productInformation">
</div>
<div>
<?php
if ($infonum > 0){
$sql = "SELECT Item, Cost, Weight, ItemImage FROM AdventureGear WHERE idAdventureGear = " . $infonum;
echo "<table align ='left' width='100%'><tr><th>Name</th><th>Price</th><th>Weight</th></tr>";
$result = mysql_query($sql);
if (mysql_num_rows($result) > 0){
list($infoname, $infoprice, $infoweight, $infoimage) = mysql_fetch_row($result);
echo"<tr>";
echo"<td align=\"left\" width=\"450px\">$infoname</td>";
echo"<td align=\"left\" width=\"325px\">" . money_format('%(#8n', $infoproce) . " </td>";
echo"<td align=\"center\">$infoweight</td>";
echo"<td align=\"left\" width=\"450px\"><img src='images\\$infoimage' height=\"160\" width=\"160\"></td>";
echo "</tr>";
}
echo"</table>";
}
?>
You have no items in your shopping cart.
</div>
</form>
</div>
<?
if ($_SESSION['cart']){
echo"<table border=\"1\" padding=\"3\" width=\"650px\"><tr><th>Name</th><th>Weight</th><th>Price</th>"
. "<th width=\"80px\">Line</th></tr>";
foreach ($_SESSION['cart'] as $product_id => $quantity){
$sql = "SELECT Item, Cost, Weight FROM AdventureGear WHERE idAdventureGear = ". $product_id . "";
$result = mysql_query($sql);
if (mysql_num_rows($result) >0){
list($name, $price, $weight) = mysql_fetch_row($result);
$weight = $weight * $quantity;
$line_cost = $price * $quantity;
$totWeight = $totWeight * $quantity;
$total = $total + $line_cost;
echo "<tr>";
echo"<td align=\"Left\" width=\"450px\">$name</td>";
echo"<td align ='\"center\" width=\"75px\">" . money_format('%(#8n', $price) . "</td>";
echo"<td align=\"center\">" . money_format('%(#8n', $line_cost) . "</td>";
echo"</tr>";
}
}
}
?>
</body>
</html>`enter code here`
に
<?phpが欠けているように見えますか？ – Slimeセッションとして保存する必要があります。 –
管理性を向上させるには、この機能を複数の機能に分割する必要があります。特定の再利用可能なタスクを突破する機能があれば、何をすべきか分かりやすいでしょう。 – Rasclatt