apache_response_headers

    (PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

    apache_response_headers — Fetch all HTTP response headers

    Description

    apache_response_headers(): array|false

    Fetch all HTTP response headers. Works in the Apache, FastCGI, CLI, and FPM webservers.

    Parameters

    This function has no parameters.

    Return Values

    An array of all Apache response headers on success or false on failure.

    Examples

    Example #1 apache_response_headers() example

    <?php
    print_r    (apache_response_headers());
    ?>

    The above example will output something similar to:

    Array
(
    [Accept-Ranges] => bytes
    [X-Powered-By] => PHP/4.3.8
)

    See Also

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    User Contributed Notes 6 notes

    up
    3
    Isaac Z dot Schlueter i at foohack dot com
    15 years ago
    This function doesn't exist on lighttpd, so I wrote this little function to emulate it:

    <?php

    if (!function_exists('apache_response_headers')) {
    function     apache_response_headers () {
    $arh = array();
    $headers = headers_list();
    foreach (    $headers as $header) {
    $header = explode(":", $header);
    $arh[array_shift($header)] = trim(implode(":", $header));
    }
    return     $arh;
    }
    }

    ?>
    up
    2
    php at mailplus dot pl
    13 years ago
    I get "Call to undefined function apache_response_headers()" when using php-cli so be aware of lack of this function CLI.
    In my case I was trying to test my app via phpunit (command line tool of course ;)) if it sends proper headers.
    up
    1
    orange
    18 years ago
    If apache_response_headers() returns an empty array, try calling flush() before and it'll get filled.
    up
    -1
    athlet
    18 years ago
    For apache_response_headers() working good, you need to set up output_buffering = Off in php.ini
    up
    -2
    Daniel Lorch
    17 years ago
    Addendum: The code

    <pre>
    <?php
    print_r    (apache_request_headers());
    ?>
    </pre>

    gives me

    Array
    (
    [X-Powered-By] => PHP/5.1.6
    )

    But the code
    <pre>
    <?php
    ob_end_flush    ();
    print_r(apache_request_headers());
    ?>
    </pre>

    Results in

    Array
    (
    [Content-Location] => phpinfo.de.php
    [Vary] => negotiate
    [TCN] => choice
    [X-Powered-By] => PHP/5.1.6
    [Keep-Alive] => timeout=15, max=96
    [Connection] => Keep-Alive
    [Transfer-Encoding] => chunked
    [Content-Type] => text/html
    [Content-Language] => de
    )
    up
    -2
    Daniel Lorch
    17 years ago
    I can confirm athlet's experience with apache_response_headers() using PHP 5.1.6. When the resulting array is empty or only contains "X-Powered-By" instead of the full list of values, you'll need to switch off output_buffering _before_ the script has been executed, for example with the following directive in .htaccess:

    php_value "output_buffering" "0"

    it _doesn't_ work when you do a you ini_set('output_buffering', 0); in your script. Not sure why that is so - it is not a bug in PHP, but probably has to do with how Apache populates the request values.
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