note 51591 added to function.get-headers

After discovering that some webservers reply with "Content-Type" and others with "Content-type" I modified the function below to use strtolower($key) to make for easy checking against these case differences. ---- Manual Page -- http://www.php.net/manual/en/function.get-headers.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+51591 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+51591&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+51591&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+51591&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+51591&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+51591&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+51591&report=yes Search -- http://master.php.net/manage/user-notes.php