douzuo0002 2012-02-26 13:01
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PHP Simple XML删除所有Children

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()); 

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

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3条回答 默认 最新

  • duanmanmian7589 2012-02-26 14:37
    关注

    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();
    

    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.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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