I have an url with RSS feed:
$url = 'http://www.myurl.com/sth?format=RSS';
I can open it in a browser without a problem. But
$feed->load($url)
returned 'false'. So I started investigating:
$ch = curl_init($file);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_exec($ch);
$retcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
print curl_error($ch); // prints 'couldn't connect to host'
echo "CODE: ".$retcode; // $retcode is 0
$file_headers = get_headers($file);
echo $file_headers[0]; // is null
So, what can be the reason for such behaviour? Is some port blocked on myurl.com server? Is there a way to work around it (like create local copy of the file and work on it)?
Probably the site has some block for external connections implemented, such check for User-Agent, referal...
maybe the server is doing some sniffing and doesnt serve anything on that url if it finds that curl is doing the work. you could try phantomJS and/or Selenium to get around such filters. Selenium has PHP bindings.
If you're on CentOS (known issue on that flavour), do the following to test and make sure that's the not issue. later you can later issue specific filtering.
> emacs /etc/selinux/config
locate following line
SELINUX=enforcing
Change this to
SELINUX=disabled
save the file and try again. it could be your localhost firewall if you can open it in a browser without a problem.
if this is an issue, set SELinux back to enforcing and issue
setsebool -P httpd_can_network_connect
if you want httpd to be able to connect to tcp ports