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Date: Tue, 29 Jan 2013 14:00:48 +0100
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To: Lester Caine <lester@lsces.co.uk>
Cc: PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Thread Safe ...
From: tyra3l@gmail.com (Ferenc Kovacs)

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On Tue, Jan 29, 2013 at 1:29 PM, Lester Caine <lester@lsces.co.uk> wrote:

> Can someone please fill in a little information here. When we start
> looking at multiple threads doing for example database lookups in paralle=
l
> with the main page generation. Does that involve 'thread safe' or is it
> done in a different way? Scheduling a data lookup on one thread while
> building the page the information is to be displayed on seems like a case
> for threading in the web server?
>
>
we don't have threads in userspace in php, sou you can't do concurrent
execution of any function, but there are a couple of extensions providing
some way for concurrent/async execution.
for the scenario what you described one can use multiple db connections and
async queries
http://www.php.net/manual/en/mysqli.poll.php#refsect1-mysqli.poll-examplesf=
or
mysql
or just a single connection and doing some other work (like rendering the
layout) while waiting for the results.
if you are interested in a generic solution for concurrent execution you
could look into http://php.net/manual/en/book.pthreads.php

--=20
Ferenc Kov=C3=A1cs
@Tyr43l - http://tyrael.hu

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