Question

Good Evening Stackoverflow Lords & Ladies,

I am attempting to develop a Layar layer to use at my work but I’m having some difficulties right out of the gate. Here’s the scenario

I have downloaded the Sample Code that Layar provides for the tutorial, Here’s the link

Now I have not modified ANY of this code.

I have set up a database with the name of joejoz_layar
In that database, I have imported the included .SQL file and THAT creates TWO tables, Layer & POI.

Now I just want to see how this thing is connecting and what the output looks like, so I upload all the included files to my server, and travel to firstTutorial_simplified.php on my box.

This is the error I get:

Message: layerName parameter is not passed in GetPOI request. Warning:
Cannot modify header information – headers already sent by (output
started at firstTutorial_simplified.php:64) in
firstTutorial_simplified.php on line 225
{“layer”:null,”hotspots”:[],”errorCode”:20,”errorString”:”No POI
found. Please adjust the range.”}

Now the SQL import does include ONE POI so I’m really confused on what I’m doing wrong here. Here’s the config.inc.php that I modified:

  define('DBHOST', 'localhost');
  define('DBDATA', 'joejoz_layar');
  define('DBUSER', 'joejo_layar01');
  define('DBPASS', 'XXXXXXXXX');

I’ve try to find the answer elsewhere only to run into stuff in Swedish… which I don’t speak. Can someone NOT related to the Swedish Chef help me?

Answer 1

It looks to me as your not passing all the required values to $_GET

eg: $_GET['layerName'], $_GET['lat'], $_GET['lon'] and $_GET['radius']

keys must match the key/value array that your sending to getRequestParams($keys); line 191,

Line 56 in firstTutorial_simplified.php matches $keys with isset($_GET[$key]) thus invoking the exception on line 59 if ones missing.

This is an API that returns a json string but you need to pass parameters

./firstTutorial_simplified.php?layerName=somelayer&lat=12345&lon=12345&radius=12345

Visiting the script directly will invoke errors as there is no checks

so really you just need todo some isset() checks else not run the code.