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这段代码错哪了DOMDOCUMENT

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2016-06-13 11:43:541020browse

这段代码哪里错了DOMDOCUMENT
如果换成previousSibling的话就正常的

<br />$doc = new DOMDocument();<br />$html = <<<HTML<br /><html><br /><body><br /><ul id="list"><br /><li>Foo</li><br /><li>Bar</li><br /></ul><br /><br /><h2 class = 'test'>heading3</h2><br /><br /><h3>heading3</h3><br /><br /><ul id="list2"><br /><li>list2</li><br /><li>list2</li><br /></ul><br /><br /></body><br /></html><br />HTML;<br /><br /><br />$doc ->loadHTML($html);<br /><br />$ul = $doc->getElementsByTagName('*');<br /><br />foreach($ul as $node) {<br />     if ($node -> hasAttribute('class')) {<br /><br />           foreach($node -> nextSibling ->childNodes as $morenodes) {<br /><br />               print_r($morenodes);<br />               }<br />    }<br />  }<br />

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