PHP Simple XML删除所有子级 [英] PHP Simple XML remove all Children

问题描述

我想在再次填充它之前从xml文件中删除所有子项（或创建一个更新，但这似乎要困难得多）。所以我所做的是

i want to remove all children from my xml file before i fill it up again (or create an update but that seemed alot harder). So what i did is

    $file = "data.xml";

$xml=simplexml_load_file($file);

$teller=0;
foreach( $entries as $entry ) {
foreach ($xml->xpath('//concerts') as $desc) {
    if($teller == 0)
    {
    $lol=$desc->children();
    unset($lol);
    }
    $concert = $desc->addChild( 'concert' );
    $concert->addChild( 'artist', array_shift( $entry ) );  
    $concert->addChild( 'location', array_shift( $entry ) );    
    $concert->addChild( 'date', array_shift( $entry ) );
    $teller++;
}    
}


file_put_contents($file, $xml->asXML()); 

但这不会删除任何内容，关于我做错了什么主意吗？

But this doesn't remove anything, any ideas on what i did wrong?

推荐答案

这里是一种可能的解决方案（在线演示）：

Here is one possible solution (online demo):

$xml = <<< XML
<?xml version='1.0' encoding='utf-8'?>
<concerts>
    <concert>
        <artist></artist>
        <date></date>
    </concert>
</concerts>
XML;

$concerts = simplexml_load_string($xml);

foreach ($concerts->xpath('/*/concert/*') as $child)
{
    unset($child[0]);
}

echo $concerts->asXML();

标记此CW，因为如何删除元素已在我提供的closevote中给出，并且此答案仅对此进行扩展。现在，已经对此进行了编辑，显示了 自引用方法以删除SimpleXML元素节点， 在PHP的SimpleXML中删除具有特定属性的孩子 a>也可能是重复的。

Marking this CW because how to delete elements is given in my supplied closevote and this answer only expands on this. And this now has been edited showing the self-reference method to delete a SimpleXML element node as outlined in an answer of the question "Remove a child with a specific attribute, in SimpleXML for PHP" which is also a possible duplicate.

这篇关于PHP Simple XML删除所有子级的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！