soap xml 响应 - 如何取出顽固的数据

Question

我正在尝试获取 faultstring 元素的内容，我更喜欢 SimpleXML 的对象语法 ($xml->...->faultstring。) 下面的 DomDocument 方法有效，但我更喜欢坚持使用 SimpleXML。

PHP 版本 5.6.40，Libxml 2.9.1。

$xmlResponse = '<?xml version="1.0" encoding="utf-8"?>
    <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
        <soap:Body>
            <soap:Fault>
                <faultcode>soap:Client</faultcode>
                <faultstring>Server did not recognize the value of HTTP Header SOAPAction: https://gw1.domain.com:4430/.</faultstring>
                <detail />
            </soap:Fault>
        </soap:Body>
    </soap:Envelope>';

// DOES NOT WORK
$xml = simplexml_load_string($xmlResponse,NULL,NULL,"http://schemas.xmlsoap.org/soap/envelope/");
$faultstring = (string) ($xml->Body->Fault->faultstring);
var_dump($faultstring);

// WORKS
$_DomObject = new DOMDocument;
$_DomObject->loadXML($xmlResponse);
if (!$_DomObject) die("Error while parsing the document");
$s = simplexml_import_dom($_DomObject);
foreach(['faultcode','faultstring','detail'] as $tag) {
    echo $tag.' => '.$_DomObject->getElementsByTagName($tag)[0]->textContent.'<br/>';
}

Answer 1

<?php
$xmlResponse = <<<XML
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <soap:Body>
        <soap:Fault>
            <faultcode>soap:Client</faultcode>
            <faultstring>Server did not recognize the value of HTTP Header SOAPAction: https://gw1.domain.com:4430/.</faultstring>
            <detail />
        </soap:Fault>
    </soap:Body>
</soap:Envelope>
XML;

XML 命名空间阻碍了；它们是元素名称的 soap: 前缀。可以注册所有命名空间并使其以这种方式工作，但仅使用 XPath 更容易：

$xml = new SimpleXMLElement($xmlResponse);
$fault = $xml->xpath("//faultstring");
echo (string)$fault[0] . "\n";

这是使用命名空间的样子。您仍然可以获得对象语法，但它变得更加复杂。

$xml = new SimpleXMLElement($xmlResponse);
$fault = $xml->children("soap", true)->Body->children("soap", true)->Fault->children()->faultstring;
echo (string)$fault . "\n";

两者的输出：

Server did not recognize the value of HTTP Header SOAPAction: https://gw1.domain.com:4430/.

soap xml 响应 - 如何取出顽固的数据

soap xml response - how to get that stubborn data out

php

xml

soap

simplexml