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
<?php
foreach (getallheaders() as $name => $value) {
echo "$name: $value\n";
}
?>不过这个函数只能在apache环境下使用，iis或者nginx并不支持，可以通过自定义函数实现
<?php
if (!function_exists('getallheaders'))
{
function getallheaders()
{
foreach ($_SERVER as $name => $value)
{
if (substr($name, 0, 5) == 'HTTP_')
{
$headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
}
}
return $headers;
}
}
?>好了，看看都打印出了啥吧
<?php print_r(getallheaders());
获得结果：
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 )
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