wp-includes/PHPMailer/PHPMailer.php:4450Return the current date and time as an RFC 822 formatted date.
string public static function rfcDate() { //Set the time zone to whatever the default is to avoid 500 errors //Will default to UTC if it's not set properly in php.ini date_default_timezone_set(@date_default_timezone_get()); return date(self::RFC822_DATE_FORMAT); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/PHPMailer/PHPMailer.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.