phpDOMDocument递归格式化缩进HTML文档

function format(\DOMNode $node, $treeIndex = 0)
{
    //不格式化的标签if (in_array($node->nodeName, array("title", "p", "span")))
        return;
    if ($node->hasChildNodes()) {
        $treeIndex++;
        $tabStart = "\r\n" . str_repeat("   ", $treeIndex);
        $tabEnd = "\r\n" . str_repeat("   ", $treeIndex - 1);
        $i = 0;
        while ($childNode = $node->childNodes->item($i++)) {
            //去除空的text nodeif ($childNode->nodeType == XML_TEXT_NODE and preg_match('#^\s*$#', $childNode->nodeValue)) {
                $node->removeChild($childNode);
                $i--;
                continue;
            }
            $node->insertBefore($node->ownerDocument->createTextNode($tabStart), $childNode);
            $i++;
            format($childNode, $treeIndex);
        };
        $node->appendChild($node->ownerDocument->createTextNode($tabEnd));
    }
}
$html = '';
$doc = new \DOMDocument();
//$doc->formatOutput = true; //不知道是不是我的理解问题，这个选项格式化出来的并不完美$doc->loadHTML($html);
format($doc->documentElement);
echo$doc->saveHTML();

以上就介绍了php DOMDocument 递归 格式化缩进HTML文档，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。