PHP获取HTTP头信息

来源：互联网发布：mac os x install dvd 编辑：程序博客网时间：2024/05/20 02:56

获取全部（客户端）HTTP请求头信息

    #1    array apache_request_headers(void)    #2：通过$_SERVER获取，每个http请求头信息都以"HTTP_"开头在$_SERVER键中    # 获取if_modified_since的请求信息    $_SERVER['HTTP_IF_MODIFIED_SINCE']

获取服务器响应一个HTTP请求所发送的所有标头

    # url 请求的服务器的URL地址    # format 0:返回的头部信息以索引数字形式，1:返回头部信息以关联数组形式    array get_headers(string $url [, int $format = 0 ] )    #示例    $head_arr = get_headers("https://www.baidu.com");    $head_arr_index = get_headers("https://www.baidu.com",1);    echo "<pre>";        print_r($head_arr);        print_r($head_arr_index);    echo "</pre>";    #输出结果分别为：    #head_arr    Array    (        [0] => HTTP/1.1 200 OK        [1] => Server: bfe/1.0.8.18        [2] => Date: Tue, 25 Apr 2017 02:50:57 GMT        [3] => Content-Type: text/html        [4] => Content-Length: 14720        [5] => Connection: close        [6] => Last-Modified: Tue, 18 Apr 2017 01:09:00 GMT        [7] => Vary: Accept-Encoding        [8] => Set-Cookie: BAIDUID=B4D4AA198C8E598CF3980583DA807FA1:FG=1; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com        [9] => Set-Cookie: BIDUPSID=B4D4AA198C8E598CF3980583DA807FA1; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com        [10] => Set-Cookie: PSTM=1493088657; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com        [11] => P3P: CP=" OTI DSP COR IVA OUR IND COM "        [12] => X-UA-Compatible: IE=Edge,chrome=1        [13] => Pragma: no-cache        [14] => Cache-control: no-cache        [15] => Accept-Ranges: bytes        [16] => Set-Cookie: __bsi=12770957019260228058_00_10_N_N_15_0303_C02F_N_N_N_0; expires=Tue, 25-Apr-17 02:51:02 GMT; domain=www.baidu.com; path=/    )    #head_arr_index    Array    (        [0] => HTTP/1.1 200 OK        [Server] => bfe/1.0.8.18        [Date] => Tue, 25 Apr 2017 02:47:11 GMT        [Content-Type] => text/html        [Content-Length] => 14720        [Connection] => close        [Last-Modified] => Tue, 18 Apr 2017 01:09:00 GMT        [Vary] => Accept-Encoding        [Set-Cookie] => Array            (                [0] => BAIDUID=D0D69F175CC2E4C205E8EA6D1DEAA1BB:FG=1; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com                [1] => BIDUPSID=D0D69F175CC2E4C205E8EA6D1DEAA1BB; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com                [2] => PSTM=1493088431; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com                [3] => __bsi=11987508469614704611_00_22_N_N_16_0303_C02F_N_N_N_0; expires=Tue, 25-Apr-17 02:47:16 GMT; domain=www.baidu.com; path=/            )        [P3P] => CP=" OTI DSP COR IVA OUR IND COM "        [X-UA-Compatible] => IE=Edge,chrome=1        [Pragma] => no-cache        [Cache-control] => no-cache        [Accept-Ranges] => bytes    )

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