On my web page, when the user types in a URL in the text field, I wan to get some information about that page, like title or link information.
Is there way to do it? On the client (JavaScript) or on the server (PHP)? And how?
+2
A:
On the server:
need simpledom
include("simpledom.php");
$html = file_get_html('http://www.google.com/');
echo $html->find('head')->outertext; // returns <head>...</head>
Byron Whitlock
2009-09-18 20:45:40
If you want the same functionality without a 3rd party library, the SimpleXML and DomXML libraries included in PHP both support xpath queries. The syntax is a bit more verbose, but it's bound to perform better, and will keep your set of installed libraries smaller.
Frank Farmer
2009-09-19 01:40:36
good luck getting malformed html to work with those ;)
Byron Whitlock
2009-09-19 17:34:10
+3
A:
You can't do it through Javascript, unless the page is in your domain. This is because cross-server scripting is restricted.
But you can use PHP (check file_get_contents() function), parse the content of the <head> tag with simpledom and then pass it to an ajax request.
rogeriopvl
2009-09-18 20:46:15
A:
In php you can open URLs like files, i.e.
$f = fopen ("http://www.site/page.htm", r);
If you want to actually use a real DOM then use simpledom or another module.
Edit: You can probably ignore the fopen() suggestion above, for some reason I was thinking you were asking only about reading sites that you had full control of.
phoebus
2009-09-18 20:46:54
most webhosts block allow_url_fopen these days. It will be disabled altogether in PHP6. A better option would be cURL if you need your application to support PHP6 or your webhost has disabled allow_url_fopen.
Mark
2009-09-18 20:48:59
My initial assumption was that he was reading a site that he controlled, which upon reflection was a poor one.cURL is certainly an option although I think I'd still probably tend toward a simpledom-stype module.
phoebus
2009-09-18 20:53:13
A:
So, you page have an input text box, and when your user types in a link you want to retrieve information about it?
This might be useful:
http://www.bin-co.com/php/scripts/load/
According to that page that would return something like this:
Array
(
[headers] => Array
(
[Date] => Mon, 18 Jun 2007 13:56:22 GMT
[Server] => Apache/2.0.54 (Unix) PHP/4.4.7 mod_ssl/2.0.54 OpenSSL/0.9.7e mod_fastcgi/2.4.2 DAV/2 SVN/1.4.2
[X-Powered-By] => PHP/5.2.2
[Expires] => Thu, 19 Nov 1981 08:52:00 GMT
[Cache-Control] => no-store, no-cache, must-revalidate, post-check=0, pre-check=0
[Pragma] => no-cache
[Set-Cookie] => PHPSESSID=85g9n1i320ao08kp5tmmneohm1; path=/
[Last-Modified] => Tue, 30 Nov 1999 00:00:00 GMT
[Vary] => Accept-Encoding
[Transfer-Encoding] => chunked
[Content-Type] => text/xml
)
[body] => ... Contents of the Page ...
[info] => Array
(
[url] => http://www.bin-co.com/rss.xml.php?section=2
[content_type] => text/xml
[http_code] => 200
[header_size] => 501
[request_size] => 146
[filetime] => -1
[ssl_verify_result] => 0
[redirect_count] => 0
[total_time] => 1.113792
[namelookup_time] => 0.180019
[connect_time] => 0.467973
[pretransfer_time] => 0.468035
[size_upload] => 0
[size_download] => 2274
[speed_download] => 2041
[speed_upload] => 0
[download_content_length] => 0
[upload_content_length] => 0
[starttransfer_time] => 0.826031
[redirect_time] => 0
)
)
OscarRyz
2009-09-18 20:48:51