Apache 函数
在线手册：中文 英文
PHP手册

apache_request_headers

(PHP 4 >= 4.3.0, PHP 5)

apache_request_headers — Fetch all HTTP request headers

说明

array apache_request_headers ( void )

Fetches all HTTP request headers from the current request.

返回值

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

更新日志

版本 说明
5.4.0 This function became available under FastCGI. Previously, it was supported only when PHP was installed as an Apache module.
4.3.3

Note:

从 PHP 4.3.3 起，也可在 Netscape/iPlanet/SunONE Web 服务器的 NSAPI 服务器模块 使用此函数。

范例

Example #1 apache_request_headers() example

<?php
$headers = apache_request_headers();

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

以上例程的输出类似于：

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

注释

Note:

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.

参见

Apache 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Fetch all HTTP request headers

用户评论:

callum85 at notspam dot msn dot com (19-Apr-2007 07:07)

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.

jrabbit (21-Jan-2007 01:04)

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 05:01)

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 );
}
///
}
///
?>