Question

我正在尝试更改XML值，然后将其另存为XML。更改没有命名空间的元素时工作正常。问题是，当我想要更改的值在命名空间中时;我可以找到并打印出来，但任何变化都会被忽略;像这样：

$ns = $xmlsingle->children('mynamespace');
foreach ($ns as $myelement)
{
    echo "my element is: [$myelement]";
    //I can change it:
    $myelement = "something else";
    echo "my element is now: [$myelement]"; //yay, value is changed!
}
//GREAT!
//But when I save the XML back, the value is not changed... apparently the children method creates a new object; not a link to the existing object
//So if I copy/paste the code above, I have the original value, not the changed value
$ns2 = $xmlsingle->children('mynamespace');
foreach ($ns2 as $myelement)
{
    echo "my element is UNCHANGED! [$myelement]";
}
//So my change's not done when I save the XML.
$xmlsingle->asXML(); //This XML is exacly the same as the original XML, without changes to the namespaced elements.

**请忽略任何可能无法编译的愚蠢错误，我从原始代码中重新输入文本，否则会太大;代码工作，当我把它放回XML时，只有NAMESPACED元素的值不变。

我不是PHP专家，我不知道如何以任何其他方式访问命名空间元素......我怎么能改变这些值？我到处搜索，但只找到如何阅读值的说明。

Answer 1

尝试这样的事情：

$xml = '
<example xmlns:foo="bar">
  <foo:a>Apple</foo:a>
  <foo:b>Banana</foo:b>
  <c>Cherry</c>
</example>';

$xmlsingle = new \SimpleXMLElement($xml);
echo "<pre>\n\n";
echo $xmlsingle->asXML();
echo "\n\n";

$ns = $xmlsingle->children('bar');
foreach ($ns as $i => $myelement){
    echo "my element is: [$myelement] ";

    //$myelement = "something else"; // <-- OLD
    $ns->$i = 'something else'; // <-- NEW

    echo "my element is now: [$myelement]"; //yay, value is changed!
    echo "\n";
}
echo "\n\n";
echo $xmlsingle->asXML();
echo "\n</pre>";

，结果应为：


    
    
      Apple
      Banana
      Cherry
    

    my element is: [Apple] my element is now: [something else]
    my element is: [Banana] my element is now: [something else]

    
    
      something else
      something else
      Cherry

希望这有帮助。

如何使用simplexml更改命名空间元素的值？

1 个答案: