Referencing an appendix in JSON using PHP - php

Question

I am currently developing against the FlightStats Schedules API, this is for a user to be able to search for flight schedules on a given route, on a given date.
End point looks like so
https://api.flightstats.com/flex/schedules/rest/v1/json/from/{departing_airport}/to/{arriving_airport}/departing/{YYYY/MM/DD}?appId=APP_ID&appKey=API_KEY&codeType=iata&extendedOptions=includeDirects
User will specify departing_airport, arriving_airport and date as YYYY/MM/DD
To give an example response, I'll use MEL, NRT and 2015/11/12 respectively
{
"request": {
"departureAirport": {
"requestedCode": "mel",
"fsCode": "MEL"
},
"arrivalAirport": {
"requestedCode": "nrt",
"fsCode": "NRT"
},
"codeType": {
"requested": "iata",
"interpreted": "IATA"
},
"departing": true,
"date": {
"year": "2015",
"month": "11",
"day": "12",
"interpreted": "2015-11-12"
},
"url": "https://api.flightstats.com/flex/schedules/rest/v1/json/from/mel/to/nrt/departing/2015/11/12"
},
"scheduledFlights": [
{
"carrierFsCode": "JQ",
"flightNumber": "23",
"departureAirportFsCode": "MEL",
"arrivalAirportFsCode": "NRT",
"stops": 0,
"departureTerminal": "2",
"arrivalTerminal": "3",
"departureTime": "2015-11-12T00:55:00.000",
"arrivalTime": "2015-11-12T08:45:00.000",
"flightEquipmentIataCode": "787",
"isCodeshare": false,
"isWetlease": false,
"serviceType": "J",
"serviceClasses": [
"R",
"F",
"J",
"Y"
],
"trafficRestrictions": [],
"codeshares": [
{
"carrierFsCode": "JL",
"flightNumber": "5086",
"serviceType": "J",
"serviceClasses": [
"Y"
],
"trafficRestrictions": [],
"referenceCode": 2088960
}
],
"referenceCode": "1492-2106903--"
},
{
"carrierFsCode": "JL",
"flightNumber": "5086",
"departureAirportFsCode": "MEL",
"arrivalAirportFsCode": "NRT",
"stops": 0,
"departureTerminal": "2",
"arrivalTerminal": "3",
"departureTime": "2015-11-12T00:55:00.000",
"arrivalTime": "2015-11-12T08:45:00.000",
"flightEquipmentIataCode": "787",
"isCodeshare": true,
"isWetlease": false,
"serviceType": "J",
"serviceClasses": [
"Y"
],
"trafficRestrictions": [],
"operator": {
"carrierFsCode": "JQ",
"flightNumber": "23",
"serviceType": "J",
"serviceClasses": [
"R",
"F",
"J",
"Y"
],
"trafficRestrictions": []
},
"codeshares": [],
"referenceCode": "1492-2106903--2088960"
}
],
"appendix": {
"airlines": [
{
"fs": "JL",
"iata": "JL",
"icao": "JAL",
"name": "JAL",
"active": true
},
{
"fs": "JQ",
"iata": "JQ",
"icao": "JST",
"name": "Jetstar",
"active": true
}
],
"airports": [
{
"fs": "NRT",
"iata": "NRT",
"icao": "RJAA",
"name": "Narita International Airport",
"street1": "成田空港第2PTB(バス), Narita",
"street2": "Chiba Prefecture",
"city": "Tokyo",
"cityCode": "TYO",
"countryCode": "JP",
"countryName": "Japan",
"regionName": "Asia",
"timeZoneRegionName": "Asia/Tokyo",
"localTime": "2015-09-21T09:37:31.611",
"utcOffsetHours": 9,
"latitude": 35.773213,
"longitude": 140.387443,
"elevationFeet": 135,
"classification": 1,
"active": true
},
{
"fs": "MEL",
"iata": "MEL",
"icao": "YMML",
"name": "Tullamarine Airport",
"city": "Melbourne",
"cityCode": "MEL",
"stateCode": "VIC",
"countryCode": "AU",
"countryName": "Australia",
"regionName": "Oceania",
"timeZoneRegionName": "Australia/Sydney",
"localTime": "2015-09-21T10:37:31.611",
"utcOffsetHours": 10,
"latitude": -37.669611,
"longitude": 144.849777,
"elevationFeet": 434,
"classification": 1,
"active": true
}
],
"equipments": [
{
"iata": "787",
"name": "Boeing 787",
"turboProp": false,
"jet": true,
"widebody": true,
"regional": false
}
]
}
}
My desired output at this stage would be for example
[appendix -> airline -> name] - [scheduledFlights -> carrierFsCode][scheduledFlights -> flightNumber]
Jetstar - JQ23
JAL - JL5086
So in a nutshell, to get the desired output, I need to reference the carrierFsCode against the airline name in the appendix for each result. Keep in mind that this example is (for brevity) a low traffic route. JFK to Heathrow for example is much more complex due to the number of flights on that route.
My quite incorrect PHP currently looks like this
$flight_json=get_flight_stats($from,$to,$date);
$flight_stats=$flight_json['scheduledFlights'];
$airlines=$flight_json['appendix']['airlines'];
foreach($flight_stats as $flight_stat)
{
echo $flight_stat['carrierFsCode'].$flight_stat['flightNumber']."<br>";
echo "<br>";
}
foreach($airlines as $airline)
{
echo $airline['name']."<br>";
}
Which returns
JQ23
JL5086
Jetstar
JAL
The get_flight_stats function is used for creating the end point URL, get_file_contents, json_decode then array_map return.
Apologies if this has been asked, just haven't been able to find the right search term and am finding myself a bit stuck.
(EDIT)
Thanks to #jolyonruss, my final code is as follows:
foreach($flight_stats as $flight_stat)
{
/* store the fsCode for this flight */
$fsCode = $flight_stat['carrierFsCode'];
foreach($airlines as $airline)
{
/* test to see if the airline's fsCode matches the flight */
if($airline['fs'] === $fsCode)
{
echo $airline['name']." - ".$fsCode.$flight_stat['flightNumber']."<br>";
}
}
}
Worked a treat.

Answer 1

It looks like you need to nest your for loops, something like this:
$flight_json=get_flight_stats($from,$to,$date);
$flight_stats=$flight_json['scheduledFlights'];
$airlines=$flight_json['appendix']['airlines'];
foreach($flight_stats as $flight_stat)
{
echo $flight_stat['carrierFsCode'].$flight_stat['flightNumber']."<br>";
echo "<br>";
/* store the fsCode for this flight */
$fsCode = $flight_stat['carrierFsCode'];
foreach($airlines as $airline)
{
/* test to see if the airline's fsCode matches the flight */
if($airline['fs'] === $fsCode)
{
echo $airline['name']."<br>";
}
}
}
This is pseudo code, but hopefully you get the idea.