- if (is_array($values)) {
- foreach ($values as $value) {
- $headerString .= $name . ': ' . $value . '\n';
- }
- } else {
- $headerString .= $name . ': ' . $values . '\n';
+ if (!is_array($values)) {
+ $values = [$values];
+ }
+
+ foreach ($values as $value) {
+ $headerString .= "$name: $value\r\n";