PHP DOMDocument getElementsByTagname？ [英] PHP DOMDocument getElementsByTagname?

问题描述

这正在推动我笨蛋...我只想添加另一个 img 节点。

This is driving me bonkers... I just want to add another img node.

$xml = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<gallery>
    <album tnPath="tn/" lgPath="imm/"  fsPath="iml/" >
    <img src="004.jpg" caption="4th caption" />
    <img src="005.jpg" caption="5th caption" />
    <img src="006.jpg" caption="6th caption" />
</album>
</gallery>
XML;

$xmlDoc = new DOMDocument();
$xmlDoc->loadXML($xml);

$album = $xmlDoc->getElementsByTagname('album')[0];
// Parse error: syntax error, unexpected '[' in /Applications/XAMPP/xamppfiles/htdocs/admin/tests/DOMDoc.php  on line 17
$album = $xmlDoc->getElementsByTagname('album');
// Fatal error: Call to undefined method DOMNodeList::appendChild() in /Applications/XAMPP/xamppfiles/htdocs/admin/tests/DOMDoc.php on line 19

$newImg = $xmlDoc->createElement("img");
$album->appendChild($newImg);

print $xmlDoc->saveXML();

错误：

推荐答案

DOMDocument :: getElementsByTagName不返回数组，它返回一个的DOMNodeList 。您需要使用项目方法来访问其项目：

DOMDocument::getElementsByTagName doesn't return an array, it returns a DOMNodeList. You need to use the item method to access its items:

$album = $xmlDoc->getElementsByTagname('album')->item(0);

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