我收到以下错误：
Notice: Undefined index: oid in C:\wamp\www\var\de\products.php on line 9
Warning: Invalid argument supplied for foreach() in C:\wamp\www\var\de\products.php on line 45
任何人都可以指导我如何解决这个问题：
<?php
include('all.php');
include('product.php');
$product = new Products();
$order_details = $product->loadOrderDetails(intval($_GET['oid']));
print $order_details;
?>
<html>
<head>
<title>Debug Test</title>
</head>
<body>
<br/>
<table align="center" border="1" cellpadding="1" cellspacing="2" width="90%">
<tr>
<th>Order id</th>
<th>Order Date</th>
<th colspan="2">Order Total</th>
</tr>
<tr>
<td><?=$order_details['order_id'];?></td>
<td><?=$order_details['ordered_on'];?></td>
<td colspan="2"><?=$order_details['order_total'];?></td>
</tr>
<tr>
<td colspan="5"> </td>
</tr>
<tr>
<th>Name</th>
<th>Description</th>
<th>Price</th>
<th>Qty</th>
</tr>
<?php
foreach ($order_details['products'] as $pid => $info) {
?>
<tr>
<td><?=$info['name'];?></td>
<td><?=$info['description'];?></td>
<td><?=$info['price'];?></td>
<td><?=$info['qty'];?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5"> </td>
</tr>
<tr>
<th colspan="5">Customer Information</th>
</tr>
<tr>
<td colspan="5">
<?=$order_details['customer_info']['username'];?><br/>
<?=$order_details['customer_info']['company_name'];?><br/>
<?=$order_details['address']['street'];?><br/>
<?=$order_details['address']['city'].', '.$order_details['address']['state'].' '.$order_details['address']['zip'];?><br/>
</td>
</tr>
</table>
</body>
</html>
all.php
<?php
/**
* Fake database access
* @return array customer info
*/
function getCustomerInfo() {
return array (
1=>array(
'customer_id' => 1,
'username'=>'george',
'address_id' => 3,
'created_on'=>'2005-01-28',
'company_name'=>'Foo Inc.',
),
2=>array(
'customer_id' => 2,
'username'=>'sam',
'address_id' => 2,
'created_on'=>'2005-10-09',
'company_name'=>'Foo Inc.',
),
3=>array(
'customer_id' => 3,
'username'=>'harrison',
'address_id' => 1,
'created_on'=>'2005-07-21',
'company_name'=>'Bar Inc.',
)
);
}
function getAddresses() {
return array(
1 => array(
'address_id' => 1,
'street' => '123 Main St.',
'city' => 'Some City',
'state' => 'PA',
'zip' => '12345'),
2 => array(
'address_id' => 2,
'street' => '345 Garden Dr.',
'city' => 'Manhatten',
'state' => 'NY',
'zip' => '55555'),
3 => array(
'address_id' => 3,
'street' => '876 Over There BLVD',
'city' => 'Atlanta',
'state' => 'GA',
'zip' => '88899'));
}
/**
* Fake database access
* @return array customer info
*/
function getOrderInfo() {
return array (
1=>array(
'order_id' => 1,
'ordered_on'=>'2006-11-17',
'ordered_by'=>1,
'order_total' => '47.00',
'products'=>array(
array('product_id' => 5, 'qty' => 2),
array('product_id' => 6, 'qty' => 1),
array('product_id' => 7, 'qty' => 3))
),
2=>array(
'order_id' => 2,
'ordered_on'=>'2006-10-17',
'ordered_by'=>1,
'order_total' => '4.00',
'products'=>array(
array('product_id' => 1, 'qty' => 3),
array('product_id' => 2, 'qty' => 1),
array('product_id' => 7, 'qty' => 2))
),
3=>array(
'order_id' => 3,
'ordered_on'=>'2006-11-12',
'ordered_by'=>3,
'order_total' => '43.00',
'products'=>array(
array('product_id' => 5, 'qty' => 1),
array('product_id' => 6, 'qty' => 2))
)
);
}
/**
* Fake database access
* @return array customer info
*/
function getProducts() {
return array (
1=>array(
'product_id' => 1,
'name'=>'Product A',
'description'=>'Fancy Product with options',
'price' => '10.00',
),
2=>array(
'product_id' => 2,
'name'=>'Product B',
'description'=>'Fancy Product with options',
'price' => '10.00',
),
3=>array(
'product_id' => 3,
'name'=>'Product C',
'description'=>'Fancy Product with options',
'price' => '20.00',
),
4=>array(
'product_id' => 4,
'name'=>'Product D',
'description'=>'Fancy Product with options',
'price' => '5.00',
),
5=>array(
'product_id' => 5,
'name'=>'Product E',
'description'=>'Fancy Product with options',
'price' => '13.00',
),
6=>array(
'product_id' => 6,
'name'=>'Product F',
'description'=>'Fancy Product with options',
'price' => '15.00',
),
7=>array(
'product_id' => 7,
'name'=>'Product G',
'description'=>'Fancy Product with options',
'price' => '2.00',
)
);
}
function print_array($a) {
echo '<pre>';
print_r($a);
echo '</pre>';
}
?>
Product.php
<?php
class Products {
var $name;
var $description;
var $productId;
function Products($id = 0, $infoArr = array()) {
if ($id > 0 && count($infoArr)) {
$this->name = $infoArr['name'];
$this->description = $infoArr[''];
$this->productId = $id;
}
}
/**
* @static
*/
function loadAllProducts() {
$arr = getProducts();
$prods = array();
foreach ($arr as $id=>$info) {
$prods[$id] = new Products($id,$info);
}
return $prods;
}
/**
* function loadOrderDetails
*
* This function should be giving us all the information about the order:
* The customer's name and address, the products that were ordered (deescriptions too) and the order totals.
* See products that php to see what is expected to be shown
*
* @param Integer $order_id the unique identifier for the order
* @return Array $cur_order the details of the order
*
*/
function loadOrderDetails($order_id) {
$orders = getOrderInfo();
$products = getProducts();
$customer = getCustomerInfo();
$address = getAddresses();
return $order_id;
}
}
?>
答案 0 :(得分：2)
错误来自此行及其错误，因为您正在尝试访问未设置的变量。
$order_details = $product->loadOrderDetails(intval($_GET['oid']));
您通过products.php?oid=123之类的网址传递GET参数，如果您不向网址添加，则会出现此错误。因此，我建议您更改代码以在使用之前检查变量是否已设置。像
if(!empty($_GET['oid'])) {
$order_details = $product->loadOrderDetails(intval($_GET['oid']));
}
您的第二个错误与第一个错误有关。由于$_GET['oid']不存在，这意味着$order_details可能是空的。因此，在执行foreach检查$ order_details不为空之前，您还需要在代码中进一步检查
答案 1 :(得分：1)
有问题的数组是$_GET[] ...这意味着......
您是否使用该变量调用文件？类似http://example.com/something.php?oid=123的内容？
因为这就是它正在寻找的东西 - 看起来所有其他错误都是这个错误的级联后果。
答案 2 :(得分：1)
您正在尝试未设置的读取字段。在没有oid参数的情况下调用脚本时会发生Perphaps，例如： products.php?oid=12345。因此，不要相信您已在$_GET['oid']设置了价值，请检查是否已设置，例如使用isset($_GET['oid'])并在此基础上，您可以决定是否尝试加载产品等。