如何在DOMDocument中重命名XML节点?我想在编写新节点之前备份XML文件中的节点。我有这个代码,我想将URLS节点重命名为URLS_BACKUP。
function backup_urls( $nodeid ) {
$dom = new DOMDocument();
$dom->load('communities.xml');
$dom->formatOutput = true;
$dom->preserveWhiteSpace = true;
// get document element
$xpath = new DOMXPath($dom);
$nodes = $xpath->query("//COMMUNITY[@ID='$nodeid']");
if ($nodes->length) {
$node = $nodes->item(0);
$xurls = $xpath->query("//COMMUNITY[@ID='$nodeid']/URLS");
if ($xurls->length) {
/* rename URLS to URLS_BACKUP */
}
}
$dom->save('communities.xml');
}
XML文件具有这种结构。
<?xml version="1.0" encoding="ISO-8859-1"?>
<COMMUNITIES>
<COMMUNITY ID="c000002">
<NAME>ID000002</NAME>
<TOP>192</TOP>
<LEFT>297</LEFT>
<WIDTH>150</WIDTH>
<HEIGHT>150</HEIGHT>
<URLS>
<URL ID="u000002">
<NAME>Facebook.com</NAME>
<URLC>http://www.facebook.com</URLC>
</URL>
</URLS>
</COMMUNITY>
</COMMUNITIES>
感谢。
答案 0 :(得分:6)
您使用fopen读取了整个xml文件列表,并使用了方法str_replace()
$ handle = fopen ('communities.xml', 'r');
while (! feof ($ handle))
{
$ buffer = fgets ($ handle, 4012);
$ buffer = str_replace ("URLS", "URLS_BACKUP", $ buffer);
}
fclose ($ handle);
$ dom-> save ('communities.xml');
答案 1 :(得分:2)
无法重命名DOM中的节点。字符串函数可能有效,但最好的解决方案是创建一个新节点并替换旧节点。
$dom = new DOMDocument();
$dom->loadXml($xml);
$xpath = new DOMXPath($dom);
$nodeId = 'c000002';
$nodes = $xpath->evaluate("//COMMUNITY[@ID='$nodeid']/URLS");
// we change the document, iterate the nodes backwards
for ($i = $nodes->length - 1; $i >= 0; $i--) {
$node = $nodes->item($i);
// create the new node
$newNode = $dom->createElement('URL_BACKUP');
// copy all children to the new node
foreach ($node->childNodes as $childNode) {
$newNode->appendChild($childNode->cloneNode(TRUE));
}
// replace the node
$node->parentNode->replaceChild($newNode, $node);
}
echo $dom->saveXml();
答案 2 :(得分:0)
知道这是不可能的,这是一个更简单的功能,用于在保存文件后重命名标记:
/**
* renames a word in a file
*
* @param string $xml_path
* @param string $orig word to rename
* @param string $new new word
* @return void
*/
public function renameNode($xml_path,$orig,$new)
{
$str=file_get_contents($xml_path);
$str=str_replace($orig, $new ,$str);
file_put_contents($xml_path, $str);
}