diff --git a/inc/config.php b/inc/config.php
index ae0a36c5..afc4ceaa 100644
--- a/inc/config.php
+++ b/inc/config.php
@@ -956,6 +956,23 @@
 	
 /*
  * ====================
+ *  Events (PHP 5.3.0+)
+ * ====================
+ */
+
+	// event_handler('post', function($post) {
+	// 	// do something
+	// });
+	
+	// event_handler('post', function($post) {
+	// 	// do something else
+	// 	
+	// 	// return an error (reject post)
+	// 	return 'Sorry, you cannot post that!';
+	// });
+
+/*
+ * ====================
  *  Other/uncategorized
  * ====================
  */
diff --git a/inc/events.php b/inc/events.php
new file mode 100644
index 00000000..a5b9129d
--- /dev/null
+++ b/inc/events.php
@@ -0,0 +1,40 @@
+<?php
+
+function event() {
+	global $events;
+	
+	$args = func_get_args();
+	
+	$event = $args[0];
+	$args = array_splice($args, 1);
+	
+	rebuildThemes($event);
+	
+	if(!isset($events[$event]))
+		return false;
+	
+	foreach($events[$event] as $callback) {
+		if(!is_callable($callback))
+			error('Event handler for ' . $event . ' is not callable!');
+		if($error = call_user_func_array($callback, $args))
+			return $error;
+	}
+	
+	return false;
+}
+
+function event_handler($event, $callback) {
+	global $events;
+	
+	if(!isset($events[$event]))
+		$events[$event] = Array();
+	
+	$events[$event][] = $callback;
+}
+
+function reset_events() {
+	global $events;
+	
+	$events = Array();
+}
+
diff --git a/inc/functions.php b/inc/functions.php
index 25ff89b5..d62c3a20 100644
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -5,6 +5,7 @@
 		exit;
 	}
 	
+	require 'inc/events.php';
 	require 'contrib/gettext/gettext.inc';
 	
 	register_shutdown_function('fatal_error_handler');
@@ -14,6 +15,13 @@
 	function loadConfig() {
 		global $board, $config, $__ip, $debug, $__version;
 		
+		reset_events();
+		
+		if(!defined('PHP_VERSION_ID')) {
+			$version = explode('.', PHP_VERSION);
+			define('PHP_VERSION_ID', ($version[0] * 10000 + $version[1] * 100 + $version[2]));
+		}
+
 		if(!isset($_SERVER['REMOTE_ADDR']))
 			$_SERVER['REMOTE_ADDR'] = '0.0.0.0';
 		
diff --git a/post.php b/post.php
index 3b309085..0066d538 100644
--- a/post.php
+++ b/post.php
@@ -595,6 +595,11 @@
 				$post['thumb'] = substr_replace($post['thumb'], '', 0, mb_strlen($board['dir'] . $config['dir']['thumb']));
 		}
 		
+		if($error = event('post', $post)) {
+			undoImage($post);
+			error($error);
+		}
+		
 		$id = post($post, $OP);
 		
 		if(isset($post['tracked_cites'])) {
@@ -643,7 +648,6 @@
 		if($config['syslog'])
 			_syslog(LOG_INFO, 'New post: /' . $board['dir'] . $config['dir']['res'] . sprintf($config['file_page'], $OP?$id:$post['thread']) . (!$OP ? '#' . $id : ''));
 		
-		rebuildThemes('post');
 		header('Location: ' . $redirect, true, $config['redirect_http']);
 	} else {
 		if(!file_exists($config['has_installed'])) {