PHP获取http头信息

go4321

　　

获取http请求的头信息。
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   
<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



<?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  
)