我不确定我是否正确命名了该标题,但基本上我有一个来自 $_POST (乐队名称)的变量,我想将它插入到这样一行中的节点名称的位置 -
$lastvisits = $address->$band->getElementsByTagName("lastvisit");
$band
在哪里
$band = $_POST['band']
因为 $address 中的节点实际上可以是任何名称,并且可能不存在。我确定必须有一个简单的方法,但我不确定格式。
如果它存在或不存在,$lastvisits = $address->$band>getElementsByTagName("lastvisit") 会带来一个错误-致命错误:在非对象中调用成员函数 getElementsByTagName()...
XML-
<?xml version="1.0"?>
<addresses>
<address>
<ip>127.0.0.1</ip>
<Beatles>
<lastvisit>12/08/2006</lastvisit>
</Beatles>
</address>
<address>
<ip>125.0.0.1</ip>
</address>
</addresses>
这是完整的代码:
$doc = new DOMDocument();
$doc->load("votingxml/addresses.xml");
$addresses = $doc->getElementsByTagName("address");
$band = strval($_POST['band']);
$pVoted = false;
$pFound = false;
//Loop through the addresses nodes and see if the person has voted before for each( $addresses as $address )
{
$ips = $address->getElementsByTagName("ip");
$ip = $ips->item(0)->nodeValue;
if ($ip == $domain){
$pFound = true;
if ($address->$band == 'NULL'){
$bandfound= false;
$newBandElement = $doc->createElement($_POST['band']);
$newLastVisitElement = $doc->createElement('lastvisit');
$dayvalue = $doc->createTextNode($today);
$dayvalue = $newLastVisitElement->appendChild($dayvalue);
$newBandElement->appendChild($newLastVisitElement);
$address->appendChild($newBandElement);
$doc->save("votingxml/addresses.xml");
$pVoted = false;
}
else{
$bandfound =true;
$lastvisits = $address->$band->getElementsByTagName("lastvisit");
$lastvisit = $lastvisits->item(0)->nodeValue;
if ($lastvisit == $today){
echo "alreadyvoted";
$pVoted = true;
}else{
$lastvisits->item(0)->nodeValue = $today;
$doc->save("votingxml/addresses.xml");
$pVoted = false;
}
}
}
else if ($ip != $domain)
{
$pFound = false;
}
}
任何帮助将不胜感激。