$http_response_header

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

$http_response_header — HTTP レスポンスヘッダ

説明

$http_response_header 配列は get_headers() 関数と似ています。 HTTP ラッパーを使用する際に、$http_response_header に HTTP レスポンスヘッダが格納されます。 $http_response_header はローカルスコープで作成されます。

例

例1 $http_response_header の例

<?php
function get_contents() {
  file_get_contents("http://example.com");
  var_dump($http_response_header); // ローカルスコープ内で変数の値を取得します
}
get_contents();
var_dump($http_response_header); // get_contents() をコールしても、関数スコープの外側では変数の値を取得しません。
?>

上の例の出力は、たとえば以下のようになります。

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"
}

Warning: Undefined variable $http_response_header
NULL

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User Contributed Notes 2 notes

down

nicolas at toniazzi dot net ¶

11 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

down

MangaII ¶

9 years 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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