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PHP:: How can be taken charset value of webpage with simple html dom parser (utf-8, windows-255, etc..)?

remark: its have to be done with html dom parser http://simplehtmldom.sourceforge.net

Example1 webpage charset input:

<meta content="text/html; charset=utf-8" http-equiv="Content-Type">

result:utf-8

Example2 webpage charset input:

<meta content="text/html; charset=windows-255" http-equiv="Content-Type">

result:windows-255

Edit:

I try this (but its not works):

$html = file_get_html('http://www.google.com/');
$el=$html->find('meta[content]',0);
echo $el->charset;

What should be change? (I know that $el->charset not working)

Thanks

Ben
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  • Run an xpath query for `//meta[@http-equiv="Content-Type"]/@content`. You'll have to parse the attribute value yourself. – Frank Farmer Jul 28 '10 at 18:19
  • @Frank SimpleHTMLDom cant do Xpath – Gordon Jul 28 '10 at 18:28
  • Suggested third party alternatives that actually use DOM instead of String Parsing: [phpQuery](http://code.google.com/p/phpquery/), [Zend_Dom](http://framework.zend.com/manual/en/zend.dom.html) and [FluentDom](http://www.fluentdom.org). – Gordon Jul 28 '10 at 18:28

3 Answers3

3

You'll have to match the string using a regular expression (I hope you have PCRE...).

$el=$html->find('meta[http-equiv=Content-Type]',0)
$fullvalue = $el->content;
preg_match('/charset=(.+)/', $fullvalue, $matches);
echo $matches[1];

Not very robust, but should work.

MvanGeest
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  • Thanks! I fix a bit and its works see my answer fix. $html = file_get_html('http://www.google.com/'); $el=$html->find('meta[content]',0); $fullvalue = $el->content; preg_match('/charset=(.+)/', $fullvalue, $matches); echo substr($matches[0], strlen("charset=")); – Ben Jul 28 '10 at 18:49
  • **Don't do that**, I made a mistake. It should be `$matches[1]`. That makes it a lot faster and more reliable. – MvanGeest Jul 28 '10 at 18:52
2
$dd = new DOMDocument;
$dd->loadHTML($data);
foreach ($dd->getElementsByTagName("meta") as $m) {
    if (strtolower($m->getAttribute("http-equiv")) == "content-type") {
        $v = $m->getAttribute("content");
        if (preg_match("#.+?/.+?;\\s?charset\\s?=\\s?(.+)#i", $v, $m))
            echo $m[1];
    }
}

Note that the DOM extension implicitly converts all the data to UTF-8.

Artefacto
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1

Thanks for MvanGeest answer - I just fix a bit and its works perfect. 

$html = file_get_html('http://www.google.com/');
$el=$html->find('meta[content]',0);
$fullvalue = $el->content;
preg_match('/charset=(.+)/', $fullvalue, $matches);
echo substr($matches[0], strlen("charset="));
Ben
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  • Weird... it's working for me. You don't need the `substr` though... just `$matches[1]`. I tested it using Google. – MvanGeest Jul 28 '10 at 22:01