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-rw-r--r--system/helpers/string_helper.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/system/helpers/string_helper.php b/system/helpers/string_helper.php
index 5860e15fb..28e6ab15f 100644
--- a/system/helpers/string_helper.php
+++ b/system/helpers/string_helper.php
@@ -253,7 +253,7 @@ if ( ! function_exists('increment_string'))
*/
function increment_string($str, $separator = '_', $first = 1)
{
- preg_match('/(.+)'.$separator.'([0-9]+)$/', $str, $match);
+ preg_match('/(.+)' . preg_quote($separator) . '([0-9]+)$/', $str, $match);
return isset($match[2]) ? $match[1].$separator.($match[2] + 1) : $str.$separator.$first;
}
}