如何强制XPath使用UTF8? [英] How to force XPath to use UTF8?
问题描述
我有一个XHTML文档通过Greasemonkey AJAX传递给PHP应用程序. PHP应用程序使用UTF8.如果我将POST内容直接输出回AJAX接收div中的textarea，则所有内容仍正确编码为UTF8.
I have an XHTML document being passed to a PHP app via Greasemonkey AJAX. The PHP app uses UTF8. If I output the POST content straight back to a textarea in the AJAX receiving div, everything is still properly encoded in UTF8.
当我尝试使用XPath进行解析
When I try to parse using XPath
$dom = new DOMDocument();
$dom->loadHTML($raw2);
$xpath = new DOMXPath($dom);
$query = '//td/text()';
$nodes = $xpath->query($query);
foreach($nodes as $node) {
var_dump($node->wholeText);
}
转储的字符串不是utf8.如何强制DOM/XPath使用UTF8?
dumped strings are not utf8. How do I force DOM/XPath to use UTF8?
推荐答案
如果它是完全有效的有效xhtml文档，则不应使用loadhtml()，而应使用load()/loadxml().
If it is a fully fledged valid xhtml document you shouldn't use loadhtml() but load()/loadxml().
给出示例xhtml文档
Given the example xhtml document
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>xhtml test</title>
</head>
<body>
<h1>A Table</h1>
<table>
<tr><th>A</th><th>O</th><th>U</th></tr>
<tr><td>Ä</td><td>Ö</td><td>Ü</td></tr>
<tr><td>ä</td><td>ö</td><td>ü</td></tr>
</table>
</body>
</html>
脚本
<?php
$raw2 = 'test.html';
$dom = new DOMDocument();
$dom->load($raw2);
$xpath = new DOMXPath($dom);
var_dump($xpath->registerNamespace('h', 'http://www.w3.org/1999/xhtml'));
$query = '//h:td/text()';
$nodes = $xpath->query($query);
foreach($nodes as $node) {
foo($node->wholeText);
}
function foo($s) {
for($i=0; $i<strlen($s); $i++) {
printf('%02X ', ord($s[$i]));
}
echo "\n";
}
打印
bool(true)
C3 84
C3 96
C3 9C
C3 A4
C3 B6
C3 BC
即输出/字符串是utf-8编码的
i.e. the output/strings are utf-8 encoded
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