PHP DOM:删除XML声明并添加doctype

时间:2017-04-29 12:34:14

标签: php html dom

我想要的是删除XML声明并添加<!DOCTYPE html>。这是一个代码示例:

$html = new DOMDocument();
$html->formatOutput = true;

$htmlNode = $html->createElement("html");
$html->appendChild($htmlNode);
$htmlNode->appendChild($html->createElement("head"));
$bodyNode = $html->createElement("body");
$bodyNode->setAttribute("data-spy", "scroll");
$bodyNode->setAttribute("data-target", "#myAffix");
$htmlNode->appendChild($bodyNode);
$mainNode = $html->createElement("main");
$bodyNode->appendChild($mainNode);
$gridcellNode = $html->createElement("div");
$gridcellNode->setAttribute("class", "grid-cell");
$mainNode->appendChild($gridcellNode);
$containerFluid = $html->createElement("div");
$containerFluid->setAttribute("class","container-fluid");
$gridcellNode->appendChild($containerFluid);


$html->saveHTMLFile("../article.html");
$html->saveHTML();
$html->save("../article2.html");

第一篇article.html不包含XML声明,但格式不正确(没有缩进)。第二个生成的article2.html有缩进,但也有<?xml version="1.0"?>。 article.html中的输出:

<html>
<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head>
<body data-spy="scroll" data-target="#myAffix"><main><div class="grid-cell"><div class="container-fluid"></div></div></main></body>
</html>
第2条中的

输出:

<?xml version="1.0"?>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
  </head>
  <body data-spy="scroll" data-target="#myAffix">
    <main>
      <div class="grid-cell">
        <div class="container-fluid"/>
      </div>
    </main>
  </body>
</html>

1 个答案:

答案 0 :(得分:1)

您可以使用LIBXML_NOXMLDECL选项删除XML声明,但这仅适用于Libxml >= 2.6.21,即:

$html->save("../article2.html", LIBXML_NOXMLDECL);

如果您没有Libxml >= 2.6.21,则唯一的选择(afaik)是:

$output = $html->saveHTML();
$the_file = "../article2.html";
$html->save($the_file);
file_put_contents($the_file, preg_replace('/<\?xml[^>]+>\s+/', '', file_get_contents($the_file)));