XML +的XPath，打印元素

Question

Notice: Undefined property: DOMNodeList::$id in D:\wamp\www\xml\index.php on line 15 
id: 

Notice: Undefined property: DOMNodeList::$name in D:\wamp\www\xml\index.php on line 16 
name: 

<?php 
$xml = new DOMDocument(); 

$xml->load('test.xml'); 

$xpath = new DOMXPath($xml); 

$query = '/people/person[id="33333"]'; 

$entries = $xpath->query($query); 

echo 'id:'. $entries->id.'<br/>'; 
echo 'name:'.$entries->name.'<br/>'; 
?> 

XML文件样本：

<people> 
... 
    <person> 
     <phone>33333</phone> 
     <name>Aadgar</name> 
     <last_name>Adas</last_name> 
    </person> 
... 
</people> 

Answer 1

首先，id节点不存在...

$query = '/people/person[id="33333"]'; 

我想你想：

$query = '/people/person[phone="33333"]'; 

然后，你必须做到：

$entries = $xpath->query($query); 

foreach ($entries as $entry) { 
    echo 'name:'. $entry->getElementsByTagName('name')->item(0)->nodeValue.'<br/>'; 
    echo 'last_name:'.$entry->getElementsByTagName('last_name')->item(0)->nodeValue.'<br/>'; 
} 

看来你在混合使用DOM和SimpleXML语法。

Answer 2

你得到了XPath的错误。 33333是手机没有身份证。

尝试

$query = '/people/person[phone="33333"]'; 

而且

他们是没有id

echo 'id:'. $entries->id.'<br/>'; 
echo 'name:'.$entries->name.'<br/>'; 

尝试removeing ID部

Answer 3

试试这个：

<?php 
    $xml = new DOMDocument(); 

    $xml->load('test.xml'); 

    $xpath = new DOMXPath($xml); 

    $query = '/people/person/phone'; 

    $entries = $xpath->query($query); 

    foreach($entries as $entry) 
    { 
     echo $entry; 
    } 
    ?>