diff options
Diffstat (limited to 'swiftmailer/swiftmailer/lib/classes/Swift/Message.php')
| -rw-r--r-- | swiftmailer/swiftmailer/lib/classes/Swift/Message.php | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/swiftmailer/swiftmailer/lib/classes/Swift/Message.php b/swiftmailer/swiftmailer/lib/classes/Swift/Message.php index 819ffc38..5c5834e2 100644 --- a/swiftmailer/swiftmailer/lib/classes/Swift/Message.php +++ b/swiftmailer/swiftmailer/lib/classes/Swift/Message.php @@ -224,7 +224,7 @@ class Swift_Message extends Swift_Mime_SimpleMessage protected function saveHeaders(array $altered) { foreach ($altered as $head) { - $lc = strtolower($head); + $lc = strtolower($head ?? ''); if (!isset($this->savedMessage['headers'][$lc])) { $this->savedMessage['headers'][$lc] = $this->getHeaders()->getAll($head); |