Added "logger" option to error configuration.

application/config/error.php

@@ -14,7 +14,7 @@ return array(
 	|
 	*/
 
-	'detail' => true,
+	'detail' => false,
 
 	/*
 	|--------------------------------------------------------------------------
@@ -24,11 +24,32 @@ return array(
 	| Would you like errors to be logged? Error logging can be extremely
 	| helpful when debugging a production application.
 	|
-	| Note: When error logging is enabled, errors will be logged even when
-	|       error detail is disabled.
+	*/
+
+	'log' => true,
+
+	/*
+	|--------------------------------------------------------------------------
+	| Error Logger
+	|--------------------------------------------------------------------------
+	|
+	| Because of the sundry ways of managing error logging, you get complete
+	| flexibility to manage error logging as you see fit.
+	|
+	| This function will be called when an error occurs in your application.
+	| You can log the error however you like.
+	|
+	| The error "severity" passed to the method is a human-readable severity
+	| level such as "Parsing Error", "Fatal Error", etc.
+	|
+	| A simple logging system has been setup for you. By default, all errors
+	| will be logged to the application/log.txt file.
 	|
 	*/
 
-	'log' => false,
+	'logger' => function($severity, $message)
+	{
+		System\File::append(APP_PATH.'storage/log.txt', date('Y-m-d H:i:s').' '.$severity.' - '.$message.PHP_EOL);
+	},
 
 );