Topic awaiting preservation: PHP: undefined index error using error_reporting(E_ALL);

Greetings! I've cranked up error_reporting using error_reporting(E_ALL); and I've resolved all issues except one. I seem to be getting:

"Notice: Undefined index: long in ...."

I get it a couple of times. The lines of code that it refers to are:

$sql = "update psor_offenders set latitude = '" . $mapData[0]['lat'] . "', longitude = '" . $mapData[0]['long'] . "' where id = '$rows[id]'";
if ($mapData[0]['lat'] != '' && $mapData[0]['long'] != ''){

The script runs fine, and there are no problems, other than the error message. I inserted

$mapData = '';

higher up, but that didn't resolve it. I tried single quoting the 0, but that didn't help either. The $mapData items DO have value....

What am I missing here?

You're accessing map data as an array of arrays.
You're storing in it a string - that has to break ;-).

try
$mapData = array(array("lat' => '', 'long' =>''))

or how about doing a var_dump($mapData) rigth before the sql and see what's really in there?