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-rw-r--r--system/libraries/Form_validation.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 1ed50844c..40ba01202 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -1405,7 +1405,7 @@ class CI_Form_validation {
*/
public function valid_base64($str)
{
- return ! preg_match('/[^a-zA-Z0-9\/\+=]/', $str);
+ return (base64_encode(base64_decode($str)) === $str);
}
// --------------------------------------------------------------------