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 — Estrae tutti gli header della richiesta HTTP
Descrizione
array apache_request_headers
( void
)
apache_request_headers() restituisce un array associativo contenente tutti gli header HTTP nella richiesta corrente. Questa funzionalità è supportata solo quando PHP è un modulo di Apache.
Example #1 esempio di apache_request_headers()
<?php
$headers = apache_request_headers();
foreach ($headers as $header => $value) {
echo "$header: $value <br />\n";
}
?>
Nota:
Prima del PHP 4.3.0, apache_request_headers() si chiamava getallheaders(). Dopo il PHP 4.3.0, getallheaders() è un alias di apache_request_headers().
Nota:
È possibile ottenere il valore delle variabili comuni CGI anche leggendole dalle variabili di ambiente; questo funziona indipendentemente dal fatto che si stia usando PHP come modulo Apache. Utilizzare phpinfo() per ottenere una lista di tutte le variabili d'ambiente disponibili.
Nota:
Dal PHP 4.3.3 è possibile utilizzare questa funzione anche con il modulo server NSAPI dei server web Netscape/iPlanet/SunONE
Vedere anche apache_response_headers().
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User Contributed Notes
apache_request_headers - [3 notes]
callum85 at notspam dot msn dot com ¶
6 years ago
limalopex.eisfux.de ¶
6 years ago
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( $arh );
}
///
}
///
?>
jrabbit ¶
6 years ago
The following code will implement an approximation of apache_request_headers for lighttpd making most scripts that use the function portable between the two platforms.
Caveats are:
1. This function will convert any _ in a header key to a -
2. This function will capitalize the first character and first character after each hyphen in each header key and lower case the rest of the key.
This does not cause a problem with standard headers which are capitalized in this manner but may cause custom headers to appear in a different case to apache.
<?php
if (!function_exists('apache_request_headers')) {
eval('
function apache_request_headers() {
foreach($_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;
}
');
}
?>