I'm not sure if it's a PHP 5x thing, or if the PHP configuration was a bit more strict, but when I tested “Project: Leaflet [1]” on another server with PHP 5 (the development server is currently at PHP 4) I received a series of errors:
Notice: Undefined index: order in XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.php on line 382
I did some searching, and I found two fixes. One, the following line:
>
```
error_reporting(E_ALL & ~E_NOTICE);
```
Or I can fix each instance, from:
>
```
if (isset($_POST['blah'] == 'foo') ...
```
to
>
```
if (isset($_POST['blah']) && ($_POST['blah'] == 'foo')) ...
```
And I'm not sure how I feel about this. On the one hand, it's keeping muddleheaded programmers [2] honest, forcing them to actually think for a change. On the other hand, it sure is annoying having to check almost all variable references to see if the variable is defined or not …
Sigh.