[wp-hackers] is there a hook firing right after the </html>?

[Haluk Karamete]

Otto,

Are you saying that by the time ( shutdown_action_hook ) runs, PHP has
already cleared the output_buffer automatically? or am I misunderstanding
you?
I though PHP's internal shutdown functions would run only and only after
the last line of script has been executed...  Since wordpress is still
running at that time, why would PHP clear the output buffer?

In that case, I won't be able to use the 'shutdown' hook for my purpose.



https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L601

601
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L601>
/**602
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L602>
*
Runs just before PHP shuts down execution.603
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L603>
 *604
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L604>
*
@since 1.2.0605
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L605>
*
@access private606
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L606>
 */607
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L607>
function shutdown_action_hook() {608
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L608>
      /**609
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L609>
       * Fires just before PHP shuts down execution.610
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L610>
       *611
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L611>
       * @since 1.2.0612
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L612>
       */613
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L613>
      do_action( 'shutdown' );614
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L614>
615
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L615>
      wp_cache_close();616
<https://core.trac.wordpress.org/browser/tags/4.1/src/wp-includes/load.php#L616>
}
That means,

On Mon, Feb 2, 2015 at 1:34 PM, Otto <otto at ottodestruct.com> wrote:

> On Mon, Feb 2, 2015 at 3:21 PM, Haluk Karamete <halukkaramete at gmail.com>
> wrote:
>
> > > Output buffer callbacks are automatically called at the conclusion of
> the
> > > script.
> >
> > Automatically called bhy WordPress?
>
>
>
> No, by PHP itself, actually.
>
> When you create an output buffer using ob_start() and fail to clear it with
> an appropriate ob_end_* call, then PHP will flush the output buffer at the
> end of script execution.
>
> Notably, this actually happens before any callbacks that were passed to
> register_shutdown_function() are called. Shutdown functions don't get the
> contents of the output buffer.
>
> -Otto
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>