PHP手册提供了现成的函数：

getallheaders

(PHP 4, PHP 5)

getallheaders — Fetch all HTTP request headers

说明

array getallheaders ( void )

Fetches all HTTP headers from the current request.

This function is an alias for apache_request_headers(). Please read theapache_request_headers() documentation for more information on how this function works.

返回值

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

Example #1 getallheaders() example

复制代码 代码如下:

<?php

foreach (getallheaders() as $name => $value) {

echo "$name: $valuen";

}

?>

不过这个函数只能在apache环境下使用，iis或者nginx并不支持，可以通过自定义函数实现

复制代码 代码如下:

<?php

<SPAN class=html>if (!function_exists('getallheaders'))

{

function getallheaders()

{

foreach ($_SERVER as $name => $value)

{

if (substr($name, 0, 5) == 'HTTP_')

{

$headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;

}

}

return $headers;

}

}</SPAN>

?>

好了，看看都打印出了啥吧

复制代码 代码如下:

<?php

print_r(getallheaders());

获得结果：

复制代码 代码如下:

Array

(

[Accept] => */*

[Accept-Language] => zh-cn

[Accept-Encoding] => gzip, deflate

[User-Agent] => Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727)

[Host] => localhost

[Connection] => Keep-Alive

)