[RESOLVED] how do you catch an exception?

[jrough]

I put some error coding in this script which i think is right.
It checks if the http GET was set if/else block.
It also checks if the $addrarray string was unserialized okay if block in the if/else.
Let me know if it looks right.

There is one thing I really need. If the geocoder doesn't work on
the google maps site. I get a javascript message then an ugly message in php.
see message below:

I need the try around the geocoder. Can you tell me how to do the catch?
It can just exit gracefully without the message. I don't want the message.

thanks,
<?php
require 'EasyGoogleMap.class.php';

//$googlemaps_api_key = "ABQIA.........";

if (isset ($GET['addr'])) {
$addr = $GET['addr'];
$addrstripped = stripslashes($addr);
$addrarray = @unserialize($addrstripped);
if ($addrarray == false) {
exit("There is a formatting error in the address list.");
}
} else {
exit("There is no value selected.");
}

try{
$gm = & new EasyGoogleMap($googlemaps_api_key);
throw exception("map could not be geocoded");
}

foreach( $addrarray as $key => $value){
$gm->SetAddress($value);
}

catch {
What goes here?
}

?>

ugly message.
Notice: Undefined variable: googlemaps_api_key in /Library/WebServer/Documents/googlemaparray3.php on line 21
ddListener(marker, 'click', function() { marker.openInfoWindowHtml(address_2.infowindowtext); }); map.addOverlay(marker); gmarkers[2] = marker; } else { map.setCenter(new GLatLng(37.4419, -122.1419), 8); } } ); // end geocoder.getLatLng var address_1 = { infowindowtext: '15272 Bolsa Chica St , Huntington Beach, Ca, 92649', full: '15272 Bolsa Chica St , Huntington Beach, Ca, 92649' }; address[1] = address_1.infowindowtext; geocoder.getLatLng ( address_1.full, function(point) { if(point) { points[1] = point; map.setCenter(point, 8); var marker = new GMarker(point, icon); GEvent.addListener(marker, 'click', function() { marker.openInfoWindowHtml(address_1.infowindowtext); }); map.addOverlay(marker); gmarkers[1] = marker; } else { map.setCenter(new GLatLng(37.4419, -122.1419), 8); } } ); // end geocoder.getLatLng var address_0 = { infowindowtext: '7069 Consolidated Way, Suite 100, San Diego, CA, 92121', full: '7069 Consolidated Way, Suite 100, San Diego, CA, 92121' }; address[0] = address_0.infowindowtext; geocoder.getLatLng ( address_0.full, function(point) { if(point) { points[0] = point; map.setCenter(point, 8); var marker = new GMarker(point, icon); GEvent.addListener(marker, 'click', function() { marker.openInfoWindowHtml(address_0.infowindowtext); }); map.addOverlay(marker); marker.openInfoWindowHtml(address_0.infowindowtext); gmarkers[0] = marker; } else { map.setCenter(new GLatLng(37.4419, -122.1419), 8); } } ); // end geocoder.getLatLng } // end if function sideClick(i) { if (gmarkers) { gmarkers.openInfoWindowHtml(address); map.setCenter(points,8); } else { var htstring = address; var stripped = htstring.replace(/(<([^{>]+)>)/ig,'');} alert('Location not found: ' + stripped); } /endif/ } /end function / Web Viewer demo plotting an address list on Google Maps.
Technique uses Google Maps API Javascript framework, PHP, and Filemaker Pro. Served by Fi

[Shrike]

Firstly, the variable googlemaps_api_key is commented out in the above code, which accounts for the PHP notice. Secondly this isn't really a proper use of Exceptions. There is little to no point in throwing an exception and then immediately catching it, since that part of the code already has control of the execution flow. You would normally throw an exception for it to be caught at an upper "layer" of code, e.g.

function exception_test()
{
  throw new Exception( 'Just a test' );
}
try
{
  exception_test();
}
catch( Exception $e )
{
  die( $e->getMessage() );
}

[jrough]

thanks, that helps. I think I understand what you mean about deeper means catch the exception earlier like at the $_GET or unserialize. That was a helpful explanation.