apache_note
There is a simple way to get request headers from Apache even on PHP running as a CGI. As far as I know, it's the only way to get the headers "If-Modified-Since" and "If-None-Match" when apache_request_headers() isn't available. You need mod_rewrite, which most web hosts seem to have enabled. Put this in an .htacess file in your web root:
RewriteEngine on
RewriteRule .* - [E=HTTP_IF_MODIFIED_SINCE:%{HTTP:If-Modified-Since}]
RewriteRule .* - [E=HTTP_IF_NONE_MATCH:%{HTTP:If-None-Match}]
The headers are then available in PHP as
<?php
$_SERVER['HTTP_IF_MODIFIED_SINCE'];
$_SERVER['HTTP_IF_NONE_MATCH'];
?>
I've tested this on PHP/5.1.6, on both Apache/2.2.3/Win32 and Apache/2.0.54/Unix, and it works perfectly.
Note: if you use RewriteRules already for clean URLs, you need to put the above rules AFTER your existing ones.
apache_request_headers
(PHP 4 >= 4.3.0, PHP 5)
apache_request_headers — Fetch all HTTP request headers
Описание
array apache_request_headers
( void
)
Fetches all HTTP request headers from the current request.
Тази функция се поддържа само, ако PHP е инсталирано като модул на Apache.
Връщани стойности
An associative array of all the HTTP headers in the current request, or FALSE on failure.
Дневник на промените
| Версия | Описание |
|---|---|
| 4.3.3 |
|
| 4.3.0 | Prior to PHP 4.3.0, apache_request_headers() was called getallheaders(). After PHP 4.3.0, getallheaders() is an alias for apache_request_headers(). |
Примери
Example #1 apache_request_headers() example
<?php
$headers = apache_request_headers();
foreach ($headers as $header => $value) {
echo "$header: $value <br />\n";
}
?>
Примерът по-горе ще изведе нещо подобно на:
Accept: */* Accept-Language: en-us Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 Host: www.example.com Connection: Keep-Alive
Бележки
Забележка: You can also get at the value of the common CGI variables by reading them from the environment, which works whether or not you are using PHP as an Apache module. Use phpinfo() to see a list of all of the available environment variables.
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User Contributed Notes
apache_request_headers
callum85 at notspam dot msn dot com
18-Apr-2007 11:07
jrabbit
21-Jan-2007 05:04
The following code will implement an approximation of apache_request_headers for lighttpd making most scripts that use the function portable between the two platforms.
Caveats are:
1. This function will convert any _ in a header key to a -
2. This function will capitalize the first character and first character after each hyphen in each header key and lower case the rest of the key.
This does not cause a problem with standard headers which are capitalized in this manner but may cause custom headers to appear in a different case to apache.
<?php
if (!function_exists('apache_request_headers')) {
eval('
function apache_request_headers() {
foreach($_SERVER as $key=>$value) {
if (substr($key,0,5)=="HTTP_") {
$key=str_replace(" ","-",ucwords(strtolower(str_replace("_"," ",substr($key,5)))));
$out[$key]=$value;
}
}
return $out;
}
');
}
?>
limalopex.eisfux.de
29-Oct-2006 09:01
I didn't found a replacement for apache_request_headers() in PHP::Compat (http://pear.php.net/package/PHP_Compat) so I wrote my own:
<?php
if( !function_exists('apache_request_headers') ) {
///
function apache_request_headers() {
$arh = array();
$rx_http = '/\AHTTP_/';
foreach($_SERVER as $key => $val) {
if( preg_match($rx_http, $key) ) {
$arh_key = preg_replace($rx_http, '', $key);
$rx_matches = array();
// do some nasty string manipulations to restore the original letter case
// this should work in most cases
$rx_matches = explode('_', $arh_key);
if( count($rx_matches) > 0 and strlen($arh_key) > 2 ) {
foreach($rx_matches as $ak_key => $ak_val) $rx_matches[$ak_key] = ucfirst($ak_val);
$arh_key = implode('-', $rx_matches);
}
$arh[$arh_key] = $val;
}
}
return( $arh );
}
///
}
///
?>