Update to CodeIgniter 2.1.0

system/helpers/string_helper.php

@@ -242,6 +242,23 @@ if ( ! function_exists('random_string'))
 
 // ------------------------------------------------------------------------
 
+/**
+ * Add's _1 to a string or increment the ending number to allow _2, _3, etc
+ *
+ * @param   string  $str  required
+ * @param   string  $separator  What should the duplicate number be appended with
+ * @param   string  $first  Which number should be used for the first dupe increment
+ * @return  string
+ */
+function increment_string($str, $separator = '_', $first = 1)
+{
+	preg_match('/(.+)'.$separator.'([0-9]+)$/', $str, $match);
+
+	return isset($match[2]) ? $match[1].$separator.($match[2] + 1) : $str.$separator.$first;
+}
+
+// ------------------------------------------------------------------------
+
 /**
  * Alternator
  *