Updated documentation and added demo-project.

demo-project/app/Handlers/CustomExceptionHandler.php

@@ -0,0 +1,28 @@
+<?php
+namespace Demo\Handlers;
+
+use Pecee\Handler\IExceptionHandler;
+use Pecee\Http\Request;
+use Pecee\SimpleRouter\RouterEntry;
+
+class CustomExceptionHandler implements IExceptionHandler {
+
+    public function handleError( Request $request, RouterEntry $router = null, \Exception $error) {
+
+        // Return json errors if we encounter an error on /api.
+        if(stripos($request->getUri(), '/api') !== false) {
+            header('content-type: application/json');
+            echo json_encode([
+                'error' => $error->getMessage(),
+                'code' => $error->getCode()
+            ]);
+            die();
+        }
+
+        // else we just throw the error
+        if($error->getCode() == 404) {
+            die(sprintf('An error occurred (%s):<br/>%s', $error->getCode(), $error->getMessage()));
+        }
+    }
+
+}