IP Geolocation Tool not working properly

[drisate]

Hey guys

I just downloaded an IP Geolocation class from

 

http://www.phpclasses.org/browse/package/3813.html

 

But when i run the script i get:

Fatal error: Call to a member function on a non-object in /home/blesmpm/public_html/site/geolocation/PHP45.XML.php on line 67

 

I have PHP4

 

The related lines are:

[...]

66. $ch = $ch->next_sibling();

67. $ch = $ch->children();

68.

69. $ch = $ch[1]->children();

[...]

 

This is the full script:

 

<?php
class PHP45XML {
	var $doc;

	function PHP45XML() {
		# boil down the version information
		if (version_compare(PHP_VERSION,'5','>='))
			define( 'PHP', 5);
		else
			define( 'PHP', 4);
	}

	function loadXML($xml) {
		// switch on the version of the PHP interpreter
		switch( PHP ) {
			case 4:
				// create and load the document in the case of php 4 using DOM XML
				if (!$this->doc = domxml_open_mem($xml))
					die("Error while parsing the XML document\n");
				break;
			case 5:
				// make DOMDocument and load the data
				$this->doc = new DOMDocument();
				$this->doc->loadXML($xml);
				break;
		}
	}

	// This function uses XPath to parse the result XML file of the hostip.info site
	function xpath($query) {
		$result = array();
		// switch on the version of the PHP interpreter
		switch( PHP ) {
			case 4:
				$xpath = $this->doc->xpath_new_context();
				// doesn't work, $namespace = $xpath->xpath_eval('namespace-uri(//*)'); // returns the namespace uri
				// we need to use the gml namespace.
				// TODO: get this out of the document proper and remove magic constant
				xpath_register_ns($xpath, "gml", 'http://www.opengis.net/gml' ); 
				$obj = xpath_eval_expression($xpath, "//gml:name"); // finds all gml:name tags
				// start of frustrating XML experience
				$firstnode = $obj->nodeset[1]; 
				$children = $firstnode->children();
				$value = $children[0]->content;
				$result['city'] = $value;

				$ch = $firstnode->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->children();
				$result['country'] = $ch[0]->content;

				$ch = $firstnode->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->children();
				$result['code'] = $ch[0]->content;

				$ch = $firstnode->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->next_sibling();
				$ch = $ch->children();

				$ch = $ch[1]->children();
				$ch = $ch[1]->children();
				$ch = $ch[1]->children();
				$lnglat        = split( ',', $ch[0]->content);
				$result['lng'] = $lnglat[0];
				$result['lat'] = $lnglat[1];
				// end of frustrating XML experience
				break;
			case 5:
				// use XPath to break apart the result into the interesting elements
				$xpath = new DOMXPath($this->doc);
				$entries = $xpath->query($query); # query = "every gml:name element anywhere in the document"

				$i = 1;
				foreach ($entries as $entry) {
					// first two gml:name entries are bogus 
					if( $i++ < 2)
						continue;

					// get the values and save them in the instance
					$result['city']    = $entry->nodeValue;
					$result['country'] = $entry->nextSibling->nextSibling->nodeValue;
					$result['code']    = $entry->nextSibling->nextSibling->nextSibling->nextSibling->nodeValue;

					$entries = $xpath->query('//gml:coordinates'); # query = "every gml:name element anywhere in the document"
					foreach ($entries as $entry) {
						$lnglat        = split( ',', $entry->nodeValue);
						$result['lng'] = $lnglat[0];
						$result['lat'] = $lnglat[1];
						break;
					}
				}
				break;
		}
		return $result;
	}
}

?>

[drisate]

bump

Anybody?

[waynew]

Where is $ch being declared?