Rebuilding with CodeIgniter 4

app/Config/Events.php

@@ -0,0 +1,52 @@
+<?php namespace Config;
+
+use CodeIgniter\Events\Events;
+use CodeIgniter\Exceptions\FrameworkException;
+
+/*
+ * --------------------------------------------------------------------
+ * Application Events
+ * --------------------------------------------------------------------
+ * Events allow you to tap into the execution of the program without
+ * modifying or extending core files. This file provides a central
+ * location to define your events, though they can always be added
+ * at run-time, also, if needed.
+ *
+ * You create code that can execute by subscribing to events with
+ * the 'on()' method. This accepts any form of callable, including
+ * Closures, that will be executed when the event is triggered.
+ *
+ * Example:
+ *      Events::on('create', [$myInstance, 'myMethod']);
+ */
+
+Events::on('pre_system', function () {
+	if (ENVIRONMENT !== 'testing')
+	{
+		if (ini_get('zlib.output_compression'))
+		{
+			throw FrameworkException::forEnabledZlibOutputCompression();
+		}
+
+		while (ob_get_level() > 0)
+		{
+			ob_end_flush();
+		}
+
+		ob_start(function ($buffer) {
+			return $buffer;
+		});
+	}
+
+	/*
+	 * --------------------------------------------------------------------
+	 * Debug Toolbar Listeners.
+	 * --------------------------------------------------------------------
+	 * If you delete, they will no longer be collected.
+	 */
+	if (ENVIRONMENT !== 'production')
+	{
+		Events::on('DBQuery', 'CodeIgniter\Debug\Toolbar\Collectors\Database::collect');
+		Services::toolbar()->respond();
+	}
+});