apache_request_headers

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

apache_request_headersFetch all HTTP request headers

Опис

array apache_request_headers ( void )

Fetches all HTTP request headers from the current request.

Значення, що повертаються

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

Журнал Змін

Версія Опис
5.5.7 This function became available in the CLI server.
5.4.0 This function became available under FastCGI. Previously, it was supported when PHP was installed as an Apache module or by the NSAPI server module in Netscape/iPlanet/SunONE webservers.

Приклади

Приклад #1 apache_request_headers() example

<?php
$headers 
apache_request_headers();

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

Наведений вище приклад виведе щось подібне до:

Accept: */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0
Host: www.example.com
Connection: Keep-Alive

Примітки

Зауваження:

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.

Прогляньте Також

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User Contributed Notes 5 notes

up
15
limalopex.eisfux.de
17 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 );
}
///
}
///
?>
up
6
Tel
4 years ago
Although we expect to see headers in mixed case, the standard RFC2616 demands that "field names are case-insensitive". PHP delivers the headers exactly untouched in whatever way the client sent them. Potentially you should expect to get any type of uppercase or lowercase or mixed.

Thus, if you want to be standards compliant, you must loop through every key and check it in a case-insensitive manner, instead of doing the obvious thing and using the name of the header as an array index.
up
9
callum85 at notspam dot msn dot com
16 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
<?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.
up
6
egocentryk
9 years ago
Superglobal $_SERVER,  used in all patches for missing getallheaders() contains only truly basic headers.  To pass ANY header into PHP in any httpd environment, including CGI/FCGI just add rule (any number of rules) into .htaccess:

RewriteRule .* - [E=HTTP_MY_HEADER:%{HTTP:My-Header}]

and the header with it's value will appear for PHP as
<?php print $_SERVER['HTTP_MY_HEADER']; ?>

And... just couldn't hold off. Rewrtiting $_SERVER keys for replacing missing function really does not require RegExps, preg_matches or evals... Try this:
<?php
function getallheaders() {
  foreach(
$_SERVER as $K=>$V){$a=explode('_' ,$K);
      if(
array_shift($a)=='HTTP'){
          
array_walk($a,function(&$v){$v=ucfirst(strtolower($v));});
      
$retval[join('-',$a)]=$V;}
    } return
$retval; }
?>
up
-9
uli dot staerk at globalways dot net
9 years ago
A slightly modified version from  limalopex.eisfux.de. Fixes the missing Headers Content-Type and Content-Length and makes it Camel-Case.

<?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
                               
$rx_matches = explode('_', strtolower($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;
                        }
                }
                if(isset(
$_SERVER['CONTENT_TYPE'])) $arh['Content-Type'] = $_SERVER['CONTENT_TYPE'];
                if(isset(
$_SERVER['CONTENT_LENGTH'])) $arh['Content-Length'] = $_SERVER['CONTENT_LENGTH'];
                return(
$arh );
        }
}
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