Description:
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Note:  SimpleXML has issues parsing tags with ":" in it.

GML tags for example are formatted like:
<gml:name>Foo</gml:name>.

In the SimpleXML Documentation, it states to put tags between {} that could contain chars. that could break the parser, like "-" for example. 

In our example below:
$xml->firstLayer->secondLayer->{'gml:name'} 

will not be parsed by SimpleXML, but SimpleXML will NOT throw an error or lead you to believe that it has NOT parsed it.  

I was parsing output from hostip.info which uses XML as an output with GML.

Here is an example of the XML I was working with when I cam a


Reproduce code:
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---
From manual page: book.simplexml
---
$ipAddr = "209.240.56.78";
$data = file_get_contents("http://api.hostip.info/?ip=".$ipAddr);

        $xml = @simplexml_load_string(str_replace(":", "_", $data));  //SimpleXML has issues parsing the ":", replacing it with underscore to make this work.

        $city = $xml->gml_featureMember->Hostip->gml_name;
        $country = $xml->gml_featureMember->Hostip->countryName;
        $country_abbrev = $xml->gml_featureMember->Hostip->countryAbbrev;

        $lat_long = $xml->gml_featureMember->Hostip->ipLocation->gml_PointProperty->gml_Point->gml_coordinates;

echo $city

Expected result:
----------------
This is what XML looks like coming from the site:
<HostipLookupResultSet version="1.0.0" xmlns="http://www.hostip.info/api" xmlns:gml="http://www.opengis.net/gml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.hostip.info/api/hostip-1.0.0.xsd">
 <gml:description>This is the Hostip Lookup Service</gml:description>
 <gml:name>hostip</gml:name>
 <gml:boundedBy>
  <gml:Null>inapplicable</gml:Null>
 </gml:boundedBy>
 <gml:featureMember>
  <Hostip>
   <gml:name>(Unknown City?)</gml:name>
   <countryName>(Unknown Country?)</countryName>
   <countryAbbrev>XX</countryAbbrev>
   <!-- Co-ordinates are unavailable -->
  </Hostip>
 </gml:featureMember>
</HostipLookupResultSet>


Based on my echo of $city, I would expect to see:

Providence RI

Actual result:
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Blank - nothing.  

SimpleXML will not throw an error if it runs into an issue parsing anything with a ":" in the tag.