CI中获取HTTP头信息的方法：
$this->input->request_headers()
在不支持apache_request_headers()的非Apache环境非常有用。返回请求头（header）数组。
$headers = $this->input->request_headers();
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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.
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
- )