PHP - Flight Itinirary Api

<?php

function extractItem(&$array, $itemKey)
{
	$data = array();
        
	foreach($array[$itemKey] as $item)
	{
              $Id = $item['Id'];  // get the id
              unset($item['Id']); // remove the id from item array
              $data[$Id] = $item; // set id as the key
	}

	unset($array[$itemKey]); // remove item from array.

	return $data; // return the new item array
} 


// get the api parametures from setup url
    $country_code = $_GET['country'];
    $originplace  = $_GET['strtplace'];
    $destination  = $_GET['endplace'];
    $start_date   = $_GET['startdate'];
    if(isset($_GET['enddate']) && $_GET['enddate']!=""){
    $end_date     = $_GET['enddate'];}
    $audult       = $_GET['audult'];
    if(isset($_GET['child']) && $_GET['child']!=""){
    $child        = $_GET['child'];}
    if(isset($_GET['infent']) && $_GET['infent']!=""){
    $infent       = $_GET['infent'];}
    $class        = $_GET['class'];
    
    if (!empty($_SERVER['HTTP_CLIENT_IP'])){
    $ip=$_SERVER['HTTP_CLIENT_IP'];}
    elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
    $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];}
    else{$ip=$_SERVER['REMOTE_ADDR'];}
    $xml = simplexml_load_file("http://www.geoplugin.net/xml.gp?ip=".$ip);
    $ip_curency = $xml->geoplugin_currencyCode ;

    $query  = "&country=".$country_code;
    $query .= "&currency=".$ip_curency;
    $query .= "&locale=en-GB";
    $query .= "&originplace=".$originplace;
    $query .= "&destinationplace=".$destination;
    $query .= "&outbounddate=".$start_date;
    if(isset($end_date) && $end_date!=""){
    $query .= "&inbounddate=".$end_date;}
    $query .= "&adults=".$audult;
    if(isset($child) && $child!=""){
    $query .= "&children=".$child;}
    if(isset($infent) && $infent!=""){
    $query .= "&infants=".$infent;}
    $query .="&locationschema=iata";
    $query .="&cabinclass=".$class;
    $query .="&pagesize=10";

$apiParamsUrl = "http://partners.api.skyscanner.net/apiservices/pricing/v1.0/".$country_code."?apikey=SECRET".$query."";
$apiParamsStr = parse_url($apiParamsUrl, PHP_URL_QUERY); // get the query string parametures
parse_str($apiParamsStr, $apiParamsArray); // parse into an array

// the api url. First we need to request for a session
$apiSessionUrl = 'http://partners.api.skyscanner.net/apiservices/pricing/v1.0';

//open connection
$ch = curl_init();

//set the url, number of POST vars, POST data
curl_setopt($ch,CURLOPT_URL, $apiSessionUrl);
curl_setopt($ch,CURLOPT_HTTPHEADER, array('Content-Type: application/x-www-form-urlencoded', 'Accept: application/json')); // make api return json data
curl_setopt($ch,CURLOPT_POST, count($apiParamsArray)); // set how many fiels
curl_setopt($ch,CURLOPT_POSTFIELDS, $apiParamsStr);    // set the fields

// caputre the headers
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_HEADER, 1);

//execute post
$response = curl_exec($ch);

// get the headers
$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$header = substr($response, 0, $header_size);
$body = substr($response, $header_size);

//close connection
curl_close($ch);

// get the api session url
preg_match('~Location: ([^\s]+)~', $header, $matches);
$apiSessionUrl = $matches[1];

// add on the api key for the session
$apiSessionUrl .= '?apiKey=' . $apiParamsArray['apikey'];

// get the json data
$data = file_get_contents($apiSessionUrl);

// decode the json
$array = json_decode($data, true);

// dump json array
printf('<pre>Poll Data  %s</pre>', print_r($array, true));

//Itineraries
		$Agents   = extractItem($array, 'Agents');   // get array of agents
//...

	foreach ($array['Itineraries'] as $Itineraries) {
        foreach($Itineraries['PricingOptions'] as $Option) {
             echo "<b> Agents: </b> ";

             // loop over agents for current priceOption
             foreach($Option['Agents'] as $agentId) {
                  echo $Agents[ $agentId ]['Name']. ', '; // echo the agent name that matches agentId.
             }
               
             echo " <br> price </b>",$Option['Price'] ,"<br />";
       }
	}
		
		//Legs
		foreach ($array['Legs'] as $Leg) {
		
			echo "<b> Departure </b> " .$Leg['Departure'], " <br> <b>Arrival </b>",$Leg['Arrival'] ,"<br />";
		}
		
		//Carriers
		foreach ($array['Carriers'] as $Carrier) {
		
				echo "<b> Name </b> " .$Carrier['Name'], " <br> Image </b>",$Carrier['ImageUrl'] ,"<br />";
		}
		
		//Places
		foreach ($array['Places'] as $Place) {
		
			echo "<b> Code </b> " .$Place['Code'], " <br> Name </b>",$Place['Name'] ,"<br />";
		}
?>