Added Kohana v3.0.9

includes/kohana/system/utf8/stristr.php

@@ -0,0 +1,28 @@
+<?php defined('SYSPATH') or die('No direct script access.');
+/**
+ * UTF8::stristr
+ *
+ * @package    Kohana
+ * @author     Kohana Team
+ * @copyright  (c) 2007-2010 Kohana Team
+ * @copyright  (c) 2005 Harry Fuecks
+ * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
+ */
+function _stristr($str, $search)
+{
+	if (UTF8::is_ascii($str) AND UTF8::is_ascii($search))
+		return stristr($str, $search);
+
+	if ($search == '')
+		return $str;
+
+	$str_lower = UTF8::strtolower($str);
+	$search_lower = UTF8::strtolower($search);
+
+	preg_match('/^(.*?)'.preg_quote($search_lower, '/').'/s', $str_lower, $matches);
+
+	if (isset($matches[1]))
+		return substr($str, strlen($matches[1]));
+
+	return FALSE;
+}