<?php /** * Zend Framework * * LICENSE * * This source file is subject to the new BSD license that is bundled * with this package in the file LICENSE.txt. * It is also available through the world-wide-web at this URL: * http://framework.zend.com/license/new-bsd * If you did not receive a copy of the license and are unable to * obtain it through the world-wide-web, please send an email * to license@zend.com so we can send you a copy immediately. * * @category Zend * @package Zend_Mail * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License * @version $Id$ */ /** * @category Zend * @package Zend_Mail * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */ final class Zend_Mail_Header_HeaderName { /** * No public constructor. */ private function __construct() { } /** * Filter the header name according to RFC 2822 * * @see http://www.rfc-base.org/txt/rfc-2822.txt (section 2.2) * @param string $name * @return string */ public static function filter($name) { $result = ''; $tot = strlen($name); for ($i = 0; $i < $tot; $i += 1) { $ord = ord($name[$i]); if ($ord > 32 && $ord < 127 && $ord !== 58) { $result .= $name[$i]; } } return $result; } /** * Determine if the header name contains any invalid characters. * * @param string $name * @return bool */ public static function isValid($name) { $tot = strlen($name); for ($i = 0; $i < $tot; $i += 1) { $ord = ord($name[$i]); if ($ord < 33 || $ord > 126 || $ord === 58) { return false; } } return true; } /** * Assert that the header name is valid. * * Raises an exception if invalid. * * @param string $name * @throws Exception\RuntimeException * @return void */ public static function assertValid($name) { if (! self::isValid($name)) { require_once 'Zend/Mail/Exception.php'; throw new Zend_Mail_Exception('Invalid header name detected'); } } }