GTFS Realtime php

Question

I have a MySQL database setup with GTFS data and I have php scripts that return stop times and I'm looking to add realtime data.

I know Google has instructions for how to use gtfs realtime with php (https://github.com/google/gtfs-realtime-bindings-php) but I can't seem to figure out how to get it working.

What I want to do is (using whatever informations is needed: trip_id, stop_id, etc.) return the trip_update delayed value so that I can update the stop time accordingly.

Does anyone know of a good tutorial? Or can someone help me figure out how to do this?

Answer 1

A more complete GTFS-realtime PHP example might look like the following:

foreach ($feed->getEntityList() as $entity) {
  if ($entity->hasTripUpdate()) {
    $trip = $entity->getTripUpdate();
    error_log("trip id: " . $trip->getTrip()->getTripId());
    foreach ($trip->getStopTimeUpdateList() as $stu) {
      if ($stu->hasArrival()) {
        $ste = $stu->getArrival();
        error_log("    arrival delay: " . $ste->getDelay());
        error_log("    arrival time: " . $ste->getTime());
      }
      if ($stu->hasDeparture()) {
        $ste = $stu->getDeparture();
        error_log("    departure delay: " . $ste->getDelay());
        error_log("    departure time: " . $ste->getTime());
      }
    }
  }
}

Notice how the method names correspond to the fields in the underlying GTFS-realtime schema:

https://developers.google.com/transit/gtfs-realtime/gtfs-realtime-proto

You can see the PHP source that was generated from the schema at:

https://github.com/google/gtfs-realtime-bindings-php/blob/master/src/gtfs-realtime.php