“未定义的命名空间前缀”的问题在 PHP 中使用 XPath？
一般来说，我对 PHP/编程非常陌生，我一直在尝试运行一个 PHP 文件，该文件设置为解析从 Google Search API for Shopping 输出的 Atom feed。然而，当运行时，代码会输出大量输入代码此处错误（警告），所有这些都与 XPath 有关：
Warning: SimpleXMLElement::xpath() [simplexmlelement.xpath]: Undefined namespace prefix in /home/ultradea/public_html/gtest/search.php on line 205
Warning: SimpleXMLElement::xpath() [simplexmlelement.xpath]: xmlXPathEval: evaluation failed in /home/ultradea/public_html/gtest/search.php on line 205
Warning: Invalid argument supplied for foreach() in /home6/legionit/public_html/pricemash/search.php on line 289
我正在使用的完整代码可以在这里找到：search.php
这是我正在使用的上传副本，它输出错误 - http://ultra-deals.com/gtest/search.php
这是有问题的具体代码
Lines 204-207
$xml = simplexml_load_string($return);
$result = $xml->xpath('//openSearch:totalResults');
$START = array_shift($xml->xpath('openSearch:startIndex'));
$RESULTS = array_shift($xml->xpath('openSearch:totalResults'));
<...> Line 261
$spelling_suggestion = array_shift($xml->xpath('s:spelling/s:suggestion'));
<...> Lines 273-280
$promos = "";
foreach ($xml->xpath('s:promotions/*') as $item) {
$promos .= "<td><a href='$item[link]'>$item[description]";
if ($item[imageLink] != "") {
$promos .= "<br/><img src='$item[imageLink]'>";
}
$promos .= "</td>";
}
<...> Lines 328-335
$NARROW = "";
foreach ($xml->xpath('s:facets/*') as $item) {
$values = $item->xpath('s:bucket');
$type = $item['type'];
$attrib_name = $item['name'];
if ($attrib_name == "") {
$attrib_name = $item['property']; // Default types
}
每一个都对应于输出的一个或多个错误消息在我上传到服务器的 search.php 文件上。我没有使用 XPath 的经验，所以我什至不确定所讨论的名称空间前缀是什么。真的很感谢您的帮助！
Very new to PHP/programming in general, and I've been trying to run a PHP file set up to parse an Atom feed outputted from the Google Search API for Shopping. When run however, the code outputs a large number enter code heref errors (warnings), all having to do with XPath:
Warning: SimpleXMLElement::xpath() [simplexmlelement.xpath]: Undefined namespace prefix in /home/ultradea/public_html/gtest/search.php on line 205
Warning: SimpleXMLElement::xpath() [simplexmlelement.xpath]: xmlXPathEval: evaluation failed in /home/ultradea/public_html/gtest/search.php on line 205
Warning: Invalid argument supplied for foreach() in /home6/legionit/public_html/pricemash/search.php on line 289
The full code I'm working with can be found here: search.php
Here's the uploaded copy I'm working with that outputs the errors - http://ultra-deals.com/gtest/search.php
And here's the specific code in question
Lines 204-207
$xml = simplexml_load_string($return);
$result = $xml->xpath('//openSearch:totalResults');
$START = array_shift($xml->xpath('openSearch:startIndex'));
$RESULTS = array_shift($xml->xpath('openSearch:totalResults'));
<...> Line 261
$spelling_suggestion = array_shift($xml->xpath('s:spelling/s:suggestion'));
<...> Lines 273-280
$promos = "";
foreach ($xml->xpath('s:promotions/*') as $item) {
$promos .= "<td><a href='$item[link]'>$item[description]";
if ($item[imageLink] != "") {
$promos .= "<br/><img src='$item[imageLink]'>";
}
$promos .= "</td>";
}
<...> Lines 328-335
$NARROW = "";
foreach ($xml->xpath('s:facets/*') as $item) {
$values = $item->xpath('s:bucket');
$type = $item['type'];
$attrib_name = $item['name'];
if ($attrib_name == "") {
$attrib_name = $item['property']; // Default types
}
Each of those correspond to one or more of the error messages outputted on the search.php file I uploaded to my server. I have no experience with XPath, so I'm not even exactly sure what the namespace prefix in question is. Really appreciate the help!
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openSearch 是这里未定义的命名空间。您必须尽早定义它，然后一切都应该开始正常工作。
openSearch is the undefined namespace here. You'll have to define that earlier, and everything should start working properly.
您应该考虑使用 XQuery PHP 扩展来解决您的问题：http://www.zorba-xquery.com/site2/html/php.html zorba-xquery.com/site2/html/php.html
You should consider using the XQuery PHP extension to solve your problem: http://www.zorba-xquery.com/site2/html/php.html