PHP 5.6.0beta1 released


(PHP 4 >= 4.3.0, PHP 5)

apache_request_headersFetch all HTTP request headers


array apache_request_headers ( void )

Fetches all HTTP request headers from the current request.

Valorile întoarse

An associative array of all the HTTP headers in the current request, or FALSE on failure.

Istoria schimbărilor

Versiunea Descriere
5.5.7 This function became available in the CLI server.
5.4.0 This function became available under FastCGI. Previously, it was supported only when PHP was installed as an Apache module.

Începând cu PHP 4.3.3 puteți utiliza această funcție cu modulul de server NSAPI și în webserver-ele Netscape/iPlanet/SunONE.


Example #1 apache_request_headers() example


foreach (
$headers as $header => $value) {
"$header$value <br />\n";

Exemplul de mai sus va afișa ceva similar cu:

Accept: */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0
Connection: Keep-Alive



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 2 notes

callum85 at notspam dot msn dot com
6 years ago
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

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.
7 years ago
I didn't found a replacement for apache_request_headers() in PHP::Compat ( so I wrote my own:

if( !function_exists('apache_request_headers') ) {
function apache_request_headers() {
$arh = array();
$rx_http = '/\AHTTP_/';
$_SERVER as $key => $val) {
preg_match($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('_', $arh_key);
count($rx_matches) > 0 and strlen($arh_key) > 2 ) {
$rx_matches as $ak_key => $ak_val) $rx_matches[$ak_key] = ucfirst($ak_val);
$arh_key = implode('-', $rx_matches);
$arh[$arh_key] = $val;
$arh );
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