$http_response_header

$http_response_header — HTTP 响应头

说明

$http_response_header 数组与 get_headers() 函数类似。当使用HTTP 包装器时，$http_response_header 将会被 HTTP 响应头信息填充。$http_response_header 将被创建于局部作用域中。

范例

Example #1 $http_response_header 范例

<?php
function get_contents() {
  file_get_contents("http://example.com");
  var_dump($http_response_header);
}
get_contents();
var_dump($http_response_header);
?>

以上例程的输出类似于：

array(9) { [0]=> string(15) "HTTP/1.1 200 OK" [1]=> string(35) "Date: Sat, 12 Apr 2008 17:30:38 GMT" [2]=> string(29) "Server: Apache/2.2.3 (CentOS)" [3]=> string(44) "Last-Modified: Tue, 15 Nov 2005 13:24:10 GMT" [4]=> string(27) "ETag: "280100-1b6-80bfd280"" [5]=> string(20) "Accept-Ranges: bytes" [6]=> string(19) "Content-Length: 438" [7]=> string(17) "Connection: close" [8]=> string(38) "Content-Type: text/html; charset=UTF-8"
}
NULL

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User Contributed Notes 2 notes

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nicolas at toniazzi dot net ¶

2 years ago

Note that the HTTP wrapper has a hard limit of 1024 characters for the header lines.
Any HTTP header received that is longer than this will be ignored and won't appear in $http_response_header.

The cURL extension doesn't have this limit.

http_fopen_wrapper.c: #define HTTP_HEADER_BLOCK_SIZE 1024

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MangaII ¶

1 year ago

parser function to get formatted headers (with response code)

<?php

function parseHeaders( $headers )
{
    $head = array();
    foreach( $headers as $k=>$v )
    {
        $t = explode( ':', $v, 2 );
        if( isset( $t[1] ) )
            $head[ trim($t[0]) ] = trim( $t[1] );
        else
        {
            $head[] = $v;
            if( preg_match( "#HTTP/[0-9\.]+\s+([0-9]+)#",$v, $out ) )
                $head['reponse_code'] = intval($out[1]);
        }
    }
    return $head;
}

print_r(parseHeaders($http_response_header));

/*
Array
(
    [0] => HTTP/1.1 200 OK
    [reponse_code] => 200
    [Date] => Fri, 01 May 2015 12:56:09 GMT
    [Server] => Apache
    [X-Powered-By] => PHP/5.3.3-7+squeeze18
    [Set-Cookie] => PHPSESSID=ng25jekmlipl1smfscq7copdl3; path=/
    [Expires] => Thu, 19 Nov 1981 08:52:00 GMT
    [Cache-Control] => no-store, no-cache, must-revalidate, post-check=0, pre-check=0
    [Pragma] => no-cache
    [Vary] => Accept-Encoding
    [Content-Length] => 872
    [Connection] => close
    [Content-Type] => text/html
)
*/

?>

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