mirror of
https://github.com/php/php-src.git
synced 2025-08-18 15:08:55 +02:00

RFC 822 *only* supports four digits for the year in order to have a compliant header. RFC 850 supports two digits for the year (y2k_incompliant :) so use that when y2k_compliance is turned off. In either case, both of these formats require that GMT be appended to the header, so we do this as well
119 lines
4.2 KiB
PHP
119 lines
4.2 KiB
PHP
<?php
|
|
//
|
|
// +----------------------------------------------------------------------+
|
|
// | PHP Version 4 |
|
|
// +----------------------------------------------------------------------+
|
|
// | Copyright (c) 1997-2002 The PHP Group |
|
|
// +----------------------------------------------------------------------+
|
|
// | This source file is subject to version 2.02 of the PHP license, |
|
|
// | that is bundled with this package in the file LICENSE, and is |
|
|
// | available at through the world-wide-web at |
|
|
// | http://www.php.net/license/2_02.txt. |
|
|
// | If you did not receive a copy of the PHP license and are unable to |
|
|
// | obtain it through the world-wide-web, please send a note to |
|
|
// | license@php.net so we can mail you a copy immediately. |
|
|
// +----------------------------------------------------------------------+
|
|
// | Authors: Stig Bakken <ssb@fast.no> |
|
|
// | |
|
|
// +----------------------------------------------------------------------+
|
|
//
|
|
// $Id$
|
|
//
|
|
// HTTP utility functions.
|
|
//
|
|
|
|
if (!empty($GLOBALS['USED_PACKAGES']['HTTP'])) return;
|
|
$GLOBALS['USED_PACKAGES']['HTTP'] = true;
|
|
|
|
class HTTP {
|
|
/**
|
|
* Format a RFC compliant HTTP header. This function
|
|
* honors the "y2k_compliance" php.ini directive.
|
|
*
|
|
* @param $time int UNIX timestamp
|
|
*
|
|
* @return HTTP date string, or false for an invalid timestamp.
|
|
*
|
|
* @author Stig Bakken <ssb@fast.no>
|
|
* @author Sterling Hughes <sterling@php.net>
|
|
*/
|
|
function Date($time) {
|
|
/* If we're y2k compliant, use the newer, reccomended RFC 822
|
|
format */
|
|
if (ini_get("y2k_compliance") == true) {
|
|
return gmdate("D, d M Y H:i:s \G\M\T", $time);
|
|
}
|
|
/* Use RFC-850 which supports two character year numbers */
|
|
else {
|
|
return gmdate("F, d-D-y H:i:s \G\M\T", $time);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Negotiate language with the user's browser through the
|
|
* Accept-Language HTTP header or the user's host address.
|
|
* Language codes are generally in the form "ll" for a language
|
|
* spoken in only one country, or "ll_CC" for a language spoken in
|
|
* a particular country. For example, U.S. English is "en_US",
|
|
* while British English is "en_UK". Portugese as spoken in
|
|
* Portugal is "pt_PT", while Brazilian Portugese is "pt_BR".
|
|
* Two-letter country codes can be found in the ISO 3166 standard.
|
|
*
|
|
* Quantities in the Accept-Language: header are supported, for
|
|
* example:
|
|
*
|
|
* Accept-Language: en_UK;q=0.7, en_US;q=0.6, no;q=1.0, dk;q=0.8
|
|
*
|
|
* @param $supported an associative array indexed by language
|
|
* codes (country codes) supported by the application. Values
|
|
* must evaluate to true.
|
|
*
|
|
* @param $default the default language to use if none is found
|
|
* during negotiation, defaults to "en_US" for U.S. English
|
|
*
|
|
* @author Stig Bakken <ssb@fast.no>
|
|
*/
|
|
function negotiateLanguage(&$supported, $default = 'en_US') {
|
|
global $HTTP_SERVER_VARS;
|
|
|
|
/* If the client has sent an Accept-Language: header, see if
|
|
* it contains a language we support.
|
|
*/
|
|
if (isset($HTTP_SERVER_VARS['HTTP_ACCEPT_LANGUAGE'])) {
|
|
$accepted = split(',[[:space:]]*', $HTTP_ACCEPT_LANGUAGE);
|
|
for ($i = 0; $i < count($accepted); $i++) {
|
|
if (eregi('^([a-z]+);[[:space:]]*q=([0-9\.]+)', $accepted[$i], &$arr)) {
|
|
$q = (double)$arr[2];
|
|
$l = $arr[1];
|
|
} else {
|
|
$q = 42;
|
|
$l = $accepted[$i];
|
|
}
|
|
if (!empty($supported[$l]) && ($q > 0.0)) {
|
|
if ($q == 42) {
|
|
return $l;
|
|
}
|
|
$candidates[$l] = $q;
|
|
}
|
|
}
|
|
if (isset($candidates)) {
|
|
arsort($candidates);
|
|
reset($candidates);
|
|
return key($candidates);
|
|
}
|
|
}
|
|
|
|
/* Check for a valid language code in the top-level domain of
|
|
* the client's host address.
|
|
*/
|
|
if (ereg("\.[^\.]+$", $HTTP_SERVER_VARS['REMOTE_HOST'], &$arr)) {
|
|
$lang = strtolower($arr[1]);
|
|
if (!empty($supported[$lang])) {
|
|
return $lang;
|
|
}
|
|
}
|
|
|
|
return $default;
|
|
}
|
|
}
|
|
?>
|