Parsing Huge xml file with php

[flint]

I am may have bitten off more then I chew but I am trying to parse an xml report from the noaa. The problem I am having is getting the attributes to pick up right in the parse. I may be going about this the complete wrong way. Please advise.

link of the xml file:
http://www.weather.gov/forecasts/xml...=rhm&pwwa=pwwa


Code for parsing the start and end times and the high and low temperature. This is not working, and I still have alot more to parse.

PHP Code:

$objDOM = new DOMDocument();
 $objDOM->load("weather.xml"); //make sure path is correct


  $note = $objDOM->getElementsByTagName("time-layout");
  $temp_max = $objDOM->getElementsByTagName("temperature type=\"maximum\"");
  $temp_min = $objDOM->getElementsByTagName("temperature type=\"minimum\"");
  // for each note tag, parse the document and get values for
// tasks and details tag.

while ($i < 7) {

 foreach( $note as $value )
  {
   $start_time = $value->getElementsByTagName("start-valid-time");
   $start_times  = $start_time->item($i)->nodeValue;

  } 
  
   foreach( $note as $value )
  {
   $end_time = $value->getElementsByTagName("end-valid-time");
   $end_times  = $end_time->item($i)->nodeValue;

  } 
  
   foreach( $temp_max as $value )
  {
   $temp_m = $value->getElementsByTagName("value");
   $temp_max  = $temp_m->item($i)->nodeValue;

  } 
  
   foreach( $temp_min as $value )
  {
   $temp_mi = $value->getElementsByTagName("value");
   $temp_mini  = $temp_mi->item($i)->nodeValue;

  }