<p>Debugging</p>

By Nabeel

• February 22, 2010

After accessing and API function, you can check for an error by:

1. Seeing the return value (true or false)
2. Or checking the DB::errno() function

If a function returns false, it means it failed. But, to ensure a true failure, check the DB::errno() value:

• DB::errno() - returns the error code that the database returned
• DB::error() - returns the error message.

Combine this use with the standard error templates:

if(DB::errno() != 0)
{
	Template::Set('message', 'An error occured! Message: '.DB::error());
Template::Show('core_error.tpl');
return false;
}

You can also output detailed information from the last database call:

DB::debug();

That will show detailed output on the screen with the query, any errors, and any results returned in an easy to review format.

Logging Errors

Within a controller, you can call:

$this->log('something');

And it will be posted to the log, in /core/logs/log.txt. This could be useful for non-invasive debugging, or for AJAX requests. These will only be written to the log when DEBUG_MODE is set to 'true' in the local.config.php file.