Dialogs Framework Basic Concepts

Dialogs Feature: Debugging Tool and Techniques

Updated: 21 Apr 2023

The Dialogs LOG (Tools section of the main Dialog sidebar nav) includes error messages and a trace of the functions run before the error occurred.
Check the "Debug" checkbox on the List Detail View for a List to automatically log helpful information when debugging List behavior.
If you want to add some of your own use the log_message() function
```
$this->log_message('Hello World.');
```
Check the Apache error log. It's called 'error_log' and it's location varies with the particular Apache installation. If you're getting the 'White Screen of Death', the reason is probably spelled out in that log. Usual suspects are mis-spelled functions, using $this outside an object, and syntax errors.
You can check for PHP syntax errors using the unix (or linux or Mac) command line. (That's a lower case 'L' not the numeral 1. It stands for 'lint' which is what you're picking out of the belly button of your code.)
```
php -l somescript.php
```
Another source of the 'White Screen of Death' is the security in KD_sanitize.inc.php It can be pretty strict but don't just turn it off. Don't be that guy.