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Date: Wed, 12 Sep 2012 11:15:38 +0200
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To: ivan.enderlin@hoa-project.net
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Subject: Re: [PHP-DEV] PHP build-in HTTP server and the HEAD method
From: damz@damz.org (Damien Tournoud)

On Wed, Sep 12, 2012 at 10:54 AM, Ivan Enderlin @ Hoa
<ivan.enderlin@hoa-project.net> wrote:
> Hello,
>
> It is probably me but it seems like the build-in HTTP server does not well
> support the HEAD method. Here is my following test case. First, the foo.php
> file:
>
>    <?php
>
>    var_dump($_SERVER['REQUEST_METHOD']);

By definition, a HEAD request MUST NOT return a message-body.

This works as expected:

<?php
header("X-Request-Method: " . $_SERVER["REQUEST_METHOD"]);
?>

Here is how it works: main/SAPI.c has code that set
SG(request_info).headers_only = 1 for HEAD requests, and as a
consequence php_request_shutdown() does not flush the output buffer
(if any) to the client. You can force a body to be sent (but that's
likely not going to work with every SAPI) by not having an output
buffer or by calling ob_end_flush() yourself.

Damien