[英]php: dom replace node by root node from another dom
我需要從其他文檔的整個節點更新節點:
原始XML:
<a>
<b>Bat</b>
</a>
我想要的輸出:
<a>
<b>bi</b>
</a>
第一次嘗試:替換為documentfragment
$original = "<a>
<b>Bat</b>
</a>";
$replace = "<b>Bi</b>";
$dom = new DOMDocument('1.0', 'utf-8');
$dom->loadXML($original);
$xpath = new DOMXpath($dom);
$b = $xpath->query('//b')->item(0);
$fragment = $dom->createDocumentFragment();
$fragment->appendXML($replace);
$dom->replaceChild($fragment, $b);
echo $dom->saveXML();
錯誤:
致命錯誤:/home/zital/scripts/php/dom.php:17中未捕獲的異常'DOMException',消息'未找到錯誤'堆棧跟蹤:
0 /home/zital/scripts/php/dom.php(17):DOMNode-> replaceChild(Object(DOMDocumentFragment),Object(DOMElement))
在第17行的/home/zital/scripts/php/dom.php中拋出1 {main}
第二次嘗試:通過導入節點替換
$original = "<a>
<b>Bat</b>
</a>";
$replace = "<b>Bi</b>";
$dom = new DOMDocument('1.0', 'utf-8');
$dom->loadXML($original);
$xpath = new DOMXpath($dom);
$b = $xpath->query('//b')->item(0);
$dom2 = new DOMDocument('1.0', 'utf-8');
$dom2->loadXML($replace);
$replace = $dom2->documentElement;
$replace = $dom->importNode($replace, true);
$dom->replaceChild($replace, $b);
echo $dom->saveXML();
錯誤:
致命錯誤:/home/zital/scripts/php/dom.php:42中未捕獲的異常'DOMException',消息'未找到錯誤'堆棧跟蹤:
0 /home/zital/scripts/php/dom.php(42):DOMNode-> replaceChild(Object(DOMElement),Object(DOMElement))
在第42行/home/zital/scripts/php/dom.php中拋出1 {main}
你沒有再做一步來獲取documentElement
$dom->documentElement->replaceChild($replace, $b);
結果將是
<?xml version="1.0"?>
<a><b>Bi</b></a>
UPD:
按照Yoshi評論的相當正確的說法,最好以這種方式寫這個
$b->parentNode->replaceChild($replace, $b);
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