我对PHP DOMDocument :: validate()有一个很大的问题,他似乎系统地询问了DTD。
当我想验证一个XHTML文档as explained here时,这是一个很大的问题。
由于w3.org似乎拒绝来自PHP服务器的所有请求,因此无法使用此方法验证我的文档...
有没有解决方案?
先谢谢
[编辑]以下是一些准确性:
/var/www/test.php:
<?php
$implementation = new DOMImplementation();
$dtd = $implementation->createDocumentType
(
'html', // qualifiedName
'-//W3C//DTD XHTML 1.0 Transitional//EN', // publicId
'http://www.w3.org/TR/xhtml1/DTD/xhtml1-'
.'transitional.dtd' // systemId
);
$document = $implementation->createDocument('', '', $dtd);
$document->validate();
Warning: DOMDocument::validate(http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd): failed to open stream: HTTP request failed! HTTP/1.0 403 Forbidden
in /var/www/test.php on line 14
Warning: DOMDocument::validate(): I/O warning : failed to load external entity "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" in /var/www/test.php on line 14
Warning: DOMDocument::validate(): Could not load the external subset "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" in /var/www/test.php on line 14
相关问题:
答案 0 :(得分:8)
与评论中指出的一样,DOMDocument::validate
有一个Bug / FeatureRequest接受DTD作为字符串:
您可以自己托管DTD并相应地更改systemId
,也可以为通过libxml完成的任何加载提供自定义流上下文。例如,提供UserAgent将绕过W3C的阻塞。您也可以通过这种方式添加代理。见
示例:
$di = new DOMImplementation;
$dom = $di->createDocument(
'html',
'html',
$di->createDocumentType(
'html',
'-//W3C//DTD XHTML 1.0 Transitional//EN',
'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'
)
);
$opts = array(
'http' => array(
'user_agent' => 'PHP libxml agent',
)
);
$context = stream_context_create($opts);
libxml_set_streams_context($context);
var_dump($dom->validate());
这将输出
Warning: DOMDocument::validate(): Element html content does not follow the DTD, expecting (head , body), got
Warning: DOMDocument::validate(): Element html namespace name for default namespace does not match the DTD
Warning: DOMDocument::validate(): Value for attribute xmlns of html is different from default "http://www.w3.org/1999/xhtml"
Warning: DOMDocument::validate(): Value for attribute xmlns of html must be "http://www.w3.org/1999/xhtml"
bool(false)