在php中从XML节点获取数据

<person>
  <first-name>ABC</first-name>
  <last-name>XYZ</last-name>
</person>

$content = file_get_contents($url);
$xml = simplexml_load_string($content);
foreach($xml->children() as $child)
  {
  echo $child->getName() . ": " . $child->first-name . "<br>";
  }

Use of undefined constant name - assumed 'name'

如前所述，不能在变量名中使用-。从我收集到的信息来看，您只是试图打印出标记名称和值。如果是这样，你可能在后面:

foreach($xml->children() as $child)
{
    echo "{$child->getName()}: $child <br />";
}

不允许在变量名中使用'-'。$child->first-name被解释为$child->first minus name。

试着用这个:

<person>
  <firstname>ABC</firstname>
  <lastname>XYZ</lastname>
</person>

然后:

$content = file_get_contents($url);
$xml = simplexml_load_string($content);
foreach($xml->children() as $child)
  {
  echo $child->getName() . ": " . $child->firstname . "<br>";
  }

it works ?

编辑:你不会有任何数据在$xml->children()，因为你没有任何。试着这样做:

<person>
  <firstname>ABC</firstname>
  <lastname>XYZ</lastname>
  <other>
    <first>111</first>
    <second>222</second>
  </other>
</person>
<?php 
$content = file_get_contents("test.xml");
$xml = simplexml_load_string($content);
foreach($xml->children() as $child)
{   
    echo $child->getName() . ": " .$child->first . "<br>";
}
 ?>

this将回显this:

firstname: 
lastname: 
other: 111

如果您想拥有第一个节点，您可以简单地执行:

echo $xml->firstname