PHP get_headers()函数详解

定义

get_headers - 取得服务器响应一个 http 请求所发送的所有头信息

描述

get_headers ( string $url [, int $format = 0 [, resource $context ]] ) : array

如果将 format 参数设为 1，则 get_headers() 返回带键值的关联数组。

context 参数
a valid context resource created with stream_context_create().

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示例

<?php
  $url = 'http://www.example.com';
  print_r(get_headers($url));
  print_r(get_headers($url, 1));
?>

输出

array
(
    [0] => http/1.1 200 ok
    [1] => date: sat, 29 may 2004 12:28:13 gmt
    [2] => server: apache/1.3.27 (unix)  (red-hat/linux)
    [3] => last-modified: wed, 08 jan 2003 23:11:55 gmt
    [4] => etag: "3f80f-1b6-3e1cb03b"
    [5] => accept-ranges: bytes
    [6] => content-length: 438
    [7] => connection: close
    [8] => content-type: text/html
)

array
(
    [0] => http/1.1 200 ok
    [date] => sat, 29 may 2004 12:28:14 gmt
    [server] => apache/1.3.27 (unix)  (red-hat/linux)
    [last-modified] => wed, 08 jan 2003 23:11:55 gmt
    [etag] => "3f80f-1b6-3e1cb03b"
    [accept-ranges] => bytes
    [content-length] => 438
    [connection] => close
    [content-type] => text/html
)

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