检索并解析与MySQL结果相关的XML记录

Question

我想从XML文件中获取信息，但无法使其工作。 这里是我的代码：

$xml = simplexml_load_file('http://www.website.de/file.xml'); 

$query = "SELECT * FROM table WHERE shop='name' and datum='' LIMIT 5";   
$result = mysql_query($query) or die("Error: " . mysql_error()); 
$db_erg = mysql_query($query); 
while ($inhalt = mysql_fetch_array($db_erg, MYSQL_ASSOC)) 
{ 
    $i = $inhalt['name']; 
    $name = $xml->record[$i]->PRODUCT_NAME; 
    $link = $xml->record[$i]->PRODUCT_LINK; 
    $preis = $xml->record[$i]->PRICE; 
    $versand = $xml->record[$i]->SHIPPING_COST; 
    $ean = $xml->record[$i]->PRODUCT_CODE; 
    $bild = $xml->record[$i]->PRODUCT_IMAGE_URL; 
    $datum = time(); 
    $id = $inhalt['id']; 
    echo "<p>".$id." geaendert.</p>"; 
} 

我每次运行它给我的错误的脚本...

Trying to get property of non-object in...

...在线路从$name到$bild 。所以我想这与$i有关，但我不明白为什么这不起作用。 我将不胜感激。

P.S：我知道这不是使用MySQL的安全方式。完成的网站上的脚本将只使用mysqli预准备语句。

这里是我操纵XML文件：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> 
<csv_data_records source="/var/www/network/domains/webservice/public_html/partner/functions/../../../../../tmp/productdata_cf45f01cb623aa26d26b25d362e11b56.tmp" datetime="2014-10-29T19:31:38+01:00" > 
    <record> 
     <PRODUCT_ID>9868.1</PRODUCT_ID> 
     <PRODUCT_CODE>4032314007020</PRODUCT_CODE> 
     <PRODUCT_CODE_TYPE>EAN</PRODUCT_CODE_TYPE> 
     <PRODUCT_NAME>Luposan Kräuterkraft 30 Pulver - 1000 g</PRODUCT_NAME> 
     <BRAND>Luposan</BRAND> 
     <PRICE>22.99</PRICE> 
     <PRICE_OLD>26.99</PRICE_OLD> 
     <PRICE_CURRENCY>EUR</PRICE_CURRENCY> 
     <CATEGORY>Hund &gt; Spezialfutter &amp; Nahrungsergänzungen &gt; Haut &amp; Fell &gt; Luposan</CATEGORY> 
     <PRODUCT_IMAGE_URL>http://marketing.net.zooplus.de/ts/i3101179/tsv?tst=!!!TIME_STAMP!!!&amp;amc=aff.zooplus.20478.24084.8290&amp;rmd=1&amp;trg=http%3A%2F%2Fmedia.zooplus.com%2Fbilder%2F1%2F400%2F9868_luposan_kraeuterkraftb_1.jpg</PRODUCT_IMAGE_URL> 
     <PRODUCT_LINK>http://marketing.net.zooplus.de/ts/i3101179/tsc?tst=!!!TIME_STAMP!!!&amp;amc=aff.zooplus.20478.24084.8290&amp;rmd=1&amp;trg=http%3A%2F%2Fwww.zooplus.de%2F-306243%2Fshop%2F%252B10PRFDEAFF%2Fhunde%2Fhundefutter_ergaenzung%2Fhaut_haare%2Fluposan%2F9868</PRODUCT_LINK> 
     <AVAILABILITY>in stock</AVAILABILITY> 
     <SHIPPING_COST>0.00</SHIPPING_COST> 
     <PRODUCT_UNIT_PRICE>22.99</PRODUCT_UNIT_PRICE> 
     <PRODUCT_UNIT_MEASURE>1</PRODUCT_UNIT_MEASURE> 
     <PRODUCT_UNIT_BASE_VALUE>kg</PRODUCT_UNIT_BASE_VALUE> 
</record> 

Answer 1

你已经发布的代码工作正常的我，所以我会想象的问题是，XML文件没有加载或者您$i超出了XML文件中值的范围。既可以防范的与添加到您的代码检查：

$xml = simpleXML_load_file($url, "SimpleXMLElement"); 
if ($xml === false) 
{ 
    die("Could not load the XML file!"); 
} 

$i = $inhalt['name']; 
if (isset ($xml->record[$i])) { 
    // do your processing 
} 
else { 
    // trigger an error/warning 
} 

如果要为大量的产品收集数据，你会发现它更有效地存储在一个阵列，通过元素名称索引。它至少可以让你不必编写大量相似的语句。

您还可以使用simpleXML's XPath implementation在您的XML文件中找到相关record，方法是将PRODUCT_ID与存储在数据库中的ID进行匹配。这里有一个例子：

$data = array(); 
$prod_id = $inhalt['artikelnummer']; 

# this finds the record nodes where the value of PRODUCT_ID is $prod_id 
# [.='$prod_id'] means the node's text content should match $prod_id 
# the /.. at the end of the query returns the parent node, i.e. the record 
foreach ($xml->xpath("record/PRODUCT_ID[.='$prod_id']/..") as $e) { 
    foreach(array('PRODUCT_NAME', 'PRODUCT_LINK', 'PRICE', 'SHIPPING_COST', 
     'PRODUCT_CODE', 'PRODUCT_IMAGE_URL') as $x) { 
     # make sure that the relevant value element is there! 
     if (isset($e->$x)) { 
      $data[$x] = (string)$e->$x; 
     } 
    } 
    print_r($data); 
    // do whatever you want with $data 
} 

输出：

Array 
(
    [PRODUCT_NAME] => Luposan Kräuterkraft 30 Pulver - 1000 g 
    [PRODUCT_LINK] => http://marketing.net.zooplus.de/ts/i3101179/tsc?tst=!!!TIME_STAMP!!!&amc=aff.zooplus.20478.24084.8290&rmd=1&trg=http%3A%2F%2Fwww.zooplus.de%2F-306243%2Fshop%2F%252B10PRFDEAFF%2Fhunde%2Fhundefutter_ergaenzung%2Fhaut_haare%2Fluposan%2F9868 
    [PRICE] => 22.99 
    [SHIPPING_COST] => 0.00 
    [PRODUCT_CODE] => 4032314007020 
    [PRODUCT_IMAGE_URL] => http://marketing.net.zooplus.de/ts/i3101179/tsv?tst=!!!TIME_STAMP!!!&amc=aff.zooplus.20478.24084.8290&rmd=1&trg=http%3A%2F%2Fmedia.zooplus.com%2Fbilder%2F1%2F400%2F9868_luposan_kraeuterkraftb_1.jpg 
)