<?xml version="1.0" encoding="utf-8" standalone="no" ?>
- <PostalCodeLookup version="1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://cgdi-dev.geoconnections.org/prototypes/schemas/cgdi/postalcode/1.0.0/postalcode.xsd" xmlns:gml="http://www.opengis.net/gml">
- <gml:boundedBy>
  <gml:Null>inapplicable</gml:Null>
  </gml:boundedBy>
- <PostalCodeResultSet sortArea="FSA">
- <PostalCode>
  <gml:name>M6M</gml:name>
  <Placename>Toronto</Placename>
  <ProvinceOrTerritory>ON</ProvinceOrTerritory>
- <gml:centerOf>
- <gml:Point srsName="http://www.opengis.net/gml/srs/epsg.xml#4326">
  <gml:coordinates>-79.48468,43.697777</gml:coordinates>
  </gml:Point>
  </gml:centerOf>
  </PostalCode>
  </PostalCodeResultSet>
  </PostalCodeLookup>

<gml:coordinates>-79.48468,43.697777</gml:coordinates>

// Extracts content from XML tag

function GetElementByName ($xml, $start, $end) {

    global $pos;
    $startpos = strpos($xml, $start);
    if ($startpos === false) {
        return false;
    }
    $endpos = strpos($xml, $end);
    $endpos = $endpos+strlen($end);   
    $pos = $endpos;
    $endpos = $endpos-$startpos;
    $endpos = $endpos - strlen($end);
    $tag = substr ($xml, $startpos, $endpos);
    $tag = substr ($tag, strlen($start));

    return $tag;

}

// Open and read xml file. You can replace this with your xml data.
function parsercode ($codepostal) {
  $file = "http://geoservices.cgdi.ca/cgi-bin/postalcode/postalcode.cgi?version=1.0.0&request=GetPostalCode&sortarea=FSA&code=".$codepostal;
  $pos = 0;
  $Nodes = array();
 
  if (!($fp = fopen($file, "r"))) {
      die("could not open XML input");
  }
  while ($getline = fread($fp, 4096)) {
      $data = $data . $getline;
  }
 
  $count = 0;
  $pos = 0;
 
  // Goes throw XML file and creates an array of all <XML_TAG> tags.
  while ($node = GetElementByName($data, "<PostalCode>", "</PostalCode>")) {
      $Nodes[$count] = $node;
      $count++;
      $data = substr($data, $pos);
  }
 
  // Gets infomation from tag siblings.
  for ($i=0; $i<$count; $i++) {
  $code = GetElementByName($Nodes[$i], "<gml:coordinates>", "</gml:coordinates>");
  }
  echo $code;
  echo $codepostal;
}

$doc = domxml_open_mem($xml);
$xpath = $doc->xpath_new_context();
$obj = $xpath->xpath_eval('//coordinates');
var_dump($obj->nodeset);

preg_match("/<gml:coordinates>(.*)<\/gml:coordinates>/i", $chaineXML, $matches);

echo $matches[1];