get_headers

(PHP 5, PHP 7)

get_headers — Fetches all the headers sent by the server in response to an HTTP request

Descrierea

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

get_headers() returns an array with the headers sent by the server in response to a HTTP request.

Parametri

url

The target URL.

format

If the optional format parameter is set to non-zero, get_headers() parses the response and sets the array's keys.

context

A valid context resource created with stream_context_create().

Valorile întoarse

Returns an indexed or associative array with the headers, or FALSE on failure.

Istoricul schimbărilor

Versiune Descriere
7.1.0 The context parameter was added.
5.1.3 This function now uses the default stream context, which can be set/changed with the stream_context_set_default() function.

Exemple

Example #1 get_headers() example

<?php
$url = 'http://www.example.com';

print_r(get_headers($url));

print_r(get_headers($url, 1));
?>

Exemplul de mai sus va afișa ceva similar cu:

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
)

Example #2 get_headers() using HEAD example

<?php
// By default get_headers uses a GET request to fetch the headers. If you
// want to send a HEAD request instead, you can do so using a stream context:
stream_context_set_default(
    array(
        'http' => array(
            'method' => 'HEAD'
        )
    )
);
$headers = get_headers('http://example.com');
?>

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