Merge pull request #4725 from tianhe1986/develop_url_encode_case_insensitive
Fix remove_invisible_characters() for URL-encoded characters in upper case
diff --git a/system/core/Common.php b/system/core/Common.php
index 85e18e4..d66649f 100644
--- a/system/core/Common.php
+++ b/system/core/Common.php
@@ -716,8 +716,8 @@
// carriage return (dec 13) and horizontal tab (dec 09)
if ($url_encoded)
{
- $non_displayables[] = '/%0[0-8bcef]/'; // url encoded 00-08, 11, 12, 14, 15
- $non_displayables[] = '/%1[0-9a-f]/'; // url encoded 16-31
+ $non_displayables[] = '/%0[0-8bcef]/i'; // url encoded 00-08, 11, 12, 14, 15
+ $non_displayables[] = '/%1[0-9a-f]/i'; // url encoded 16-31
}
$non_displayables[] = '/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S'; // 00-08, 11, 12, 14-31, 127