<?php

ini_set('display_errors', '1');

  $URL = 'http://data.fmi.fi/wfs?request=getFeature&storedquery_id=fmi::observations::weather::realtime::place::timevaluepair&fmi-apikey=b37f3e99-cdb8-4858-b850-bfffea6542f9&place=salo&timestep=30&crs=EPSG::3067&maxlocations=6';
  $root = "/home/web3/public_html/cache/";
  $cacheName = $root.'fmicurr.txt';  // prototype for path/filename for cache file
  $fetchSeconds = 1200;  // refresh every hour

  if (file_exists($cacheName) and filemtime($cacheName) + $fetchSeconds > time()) {
    $html = file_get_contents($cacheName);
  } else {
    $html = file_get_contents($URL);
    file_put_contents($cacheName,$html);;
    chmod($cacheName, 0666);
  }


  $xml=xml2array($html);
  
  $xml = $xml["wfs:FeatureCollection"]["wfs:member"]; 
  //print_r($xml);
//echo count($xml).'<br/>';
  $u = 0;
  $lastid = 0;
  for($i=0;$i<count($xml);$i++){
  $line = $xml[$i]["omso:PointTimeSeriesObservation"];
  $id = $line["om:resultTime"]["gml:TimeInstant_attr"]["gml:id"];
  if($i>0){
    $id = str_replace("#","",$line["om:resultTime_attr"]["xlink:href"]);
  }
  $last = count($line["om:result"]["wml2:MeasurementTimeseries"]["wml2:point"])-1;
  $id = str_replace("time2-","",$id);
  if($lastid<>$id){
    $u++;
    $lastid=$id;
    $vars[$u][time] = strtotime($line["om:result"]["wml2:MeasurementTimeseries"]["wml2:point"][$last]["wml2:MeasurementTVP"]["wml2:time"]);
    $vars[$u][id] = $id;
  }
   // echo $id.'<br/>';
  
  $var = $line["om:result"]["wml2:MeasurementTimeseries_attr"]["gml:id"];
  $var = str_replace("for-obs-".$id."-","",$var);
  $vars[$u][$var] = $line["om:result"]["wml2:MeasurementTimeseries"]["wml2:point"][$last]["wml2:MeasurementTVP"]["wml2:value"];
  //echo $last.'<br/>';
  }
  
  file_put_contents($root.'fmi.json',json_encode($vars));
  
 // print_r($vars);

function xml2array($contents, $get_attributes=1, $priority = 'tag') {
    if(!$contents) return array();

    if(!function_exists('xml_parser_create')) {
        //print "'xml_parser_create()' function not found!";
        return array();
    }

    //Get the XML parser of PHP - PHP must have this module for the parser to work
    $parser = xml_parser_create('');
    xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, "UTF-8"); # http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss
    xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
    xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
    xml_parse_into_struct($parser, trim($contents), $xml_values);
    xml_parser_free($parser);

    if(!$xml_values) return;//Hmm...

    //Initializations
    $xml_array = array();
    $parents = array();
    $opened_tags = array();
    $arr = array();

    $current = &$xml_array; //Refference

    //Go through the tags.
    $repeated_tag_index = array();//Multiple tags with same name will be turned into an array
    foreach($xml_values as $data) {
        unset($attributes,$value);//Remove existing values, or there will be trouble

        //This command will extract these variables into the foreach scope
        // tag(string), type(string), level(int), attributes(array).
        extract($data);//We could use the array by itself, but this cooler.

        $result = array();
        $attributes_data = array();
        
        if(isset($value)) {
            if($priority == 'tag') $result = $value;
            else $result['value'] = $value; //Put the value in a assoc array if we are in the 'Attribute' mode
        }

        //Set the attributes too.
        if(isset($attributes) and $get_attributes) {
            foreach($attributes as $attr => $val) {
                if($priority == 'tag') $attributes_data[$attr] = $val;
                else $result['attr'][$attr] = $val; //Set all the attributes in a array called 'attr'
            }
        }

        //See tag status and do the needed.
        if($type == "open") {//The starting of the tag '<tag>'
            $parent[$level-1] = &$current;
            if(!is_array($current) or (!in_array($tag, array_keys($current)))) { //Insert New tag
                $current[$tag] = $result;
                if($attributes_data) $current[$tag. '_attr'] = $attributes_data;
                $repeated_tag_index[$tag.'_'.$level] = 1;

                $current = &$current[$tag];

            } else { //There was another element with the same tag name

                if(isset($current[$tag][0])) {//If there is a 0th element it is already an array
                    $current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result;
                    $repeated_tag_index[$tag.'_'.$level]++;
                } else {//This section will make the value an array if multiple tags with the same name appear together
                    $current[$tag] = array($current[$tag],$result);//This will combine the existing item and the new item together to make an array
                    $repeated_tag_index[$tag.'_'.$level] = 2;
                    
                    if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
                        $current[$tag]['0_attr'] = $current[$tag.'_attr'];
                        unset($current[$tag.'_attr']);
                    }

                }
                $last_item_index = $repeated_tag_index[$tag.'_'.$level]-1;
                $current = &$current[$tag][$last_item_index];
            }

        } elseif($type == "complete") { //Tags that ends in 1 line '<tag />'
            //See if the key is already taken.
            if(!isset($current[$tag])) { //New Key
                $current[$tag] = $result;
                $repeated_tag_index[$tag.'_'.$level] = 1;
                if($priority == 'tag' and $attributes_data) $current[$tag. '_attr'] = $attributes_data;

            } else { //If taken, put all things inside a list(array)
                if(isset($current[$tag][0]) and is_array($current[$tag])) {//If it is already an array...

                    // ...push the new element into that array.
                    $current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result;
                    
                    if($priority == 'tag' and $get_attributes and $attributes_data) {
                        $current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
                    }
                    $repeated_tag_index[$tag.'_'.$level]++;

                } else { //If it is not an array...
                    $current[$tag] = array($current[$tag],$result); //...Make it an array using using the existing value and the new value
                    $repeated_tag_index[$tag.'_'.$level] = 1;
                    if($priority == 'tag' and $get_attributes) {
                        if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
                            
                            $current[$tag]['0_attr'] = $current[$tag.'_attr'];
                            unset($current[$tag.'_attr']);
                        }
                        
                        if($attributes_data) {
                            $current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
                        }
                    }
                    $repeated_tag_index[$tag.'_'.$level]++; //0 and 1 index is already taken
                }
            }

        } elseif($type == 'close') { //End of tag '</tag>'
            $current = &$parent[$level-1];
        }
    }
    
    return($xml_array);
}      
?>