PHP实现取得HTTP请求的原文_PHP
本文实例讲述了PHP实现取得HTTP请求的原文的方法,具体步骤如下:
1. 取得请求行:Method、URI、协议
可以从超级变量$_SERVER中获得,三个变量的值如下:
$_SERVER['REQUEST_METHOD'].' '.$_SERVER['REQUEST_URI'].' '.$_SERVER['SERVER_PROTOCOL']."\r\n";
2. 取得所有Header
PHP有个内置函数getallheader(),是apache_request_headers()函数的一个别名,可以将HTTP请求的所有Header以数组形式返回。但这个函数只能工作在Apache下,如果换了Nginx或者命令行,会直接报函数不存在的错误。
比较通用的方法是,从超级变量$_SERVER中提取出来,有关Header的键值都是“HTTP_”开头的,可以根据此特点取得所有的Header。
具体代码如下:
function get_all_headers() { $headers = array(); foreach($_SERVER as $key => $value) { if(substr($key, 0, 5) === 'HTTP_') { $key = substr($key, 5); $key = strtolower($key); $key = str_replace('_', ' ', $key); $key = ucwords($key); $key = str_replace(' ', '-', $key); $headers[$key] = $value; } } return $headers; }
3. 取得Body
官方提供了一种获取请求Body的方法,即:
file_get_contents('php://input')
4. 最终完整代码如下:
/** * 获取HTTP请求原文 * @return string */ function get_http_raw() { $raw = ''; // (1) 请求行 $raw .= $_SERVER['REQUEST_METHOD'].' '.$_SERVER['REQUEST_URI'].' '.$_SERVER['SERVER_PROTOCOL']."\r\n"; // (2) 请求Headers foreach($_SERVER as $key => $value) { if(substr($key, 0, 5) === 'HTTP_') { $key = substr($key, 5); $key = str_replace('_', '-', $key); $raw .= $key.': '.$value."\r\n"; } } // (3) 空行 $raw .= "\r\n"; // (4) 请求Body $raw .= file_get_contents('php://input'); return $raw; }
感兴趣的读者可以调试一下本文所述实例,以加深理解。相信对大家的PHP程序设计有一定的帮助作用。

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