PHP and Multi-thread

[OutsiderJustice]

Hi All,

I can not find any information if PHP support multi-thread (Posix
thread) or not at all, can someone give out some information? Is it
supported? If yes, where's the info? If no, is it possible to make
doing multi-thread stuff?

Thanks.

YF

[Chris Hope]

Re: PHP and Multi-thread

OutsiderJustice wrote:
[color=blue]
> I can not find any information if PHP support multi-thread (Posix
> thread) or not at all, can someone give out some information? Is it
> supported? If yes, where's the info? If no, is it possible to make
> doing multi-thread stuff?[/color]

You can do it, but don't try doing it when it's a script on a webserver.
Check out the following links (the 1st one is the PHP manual; the 2nd one
is a link on my website about how to do just this):

http://www.php.net/pcntl

http://www.electrictoolbox.com/article/php/process-forking/

Chris

--
Chris Hope
The Electric Toolbox Ltd

http://www.electrictoolbox.com/

[OutsiderJustice]

Re: PHP and Multi-thread

Chris Hope <blackhole@elec trictoolbox.com > wrote in message news:<7xObc.480 6$d%6.87672@new s.xtra.co.nz>.. .[color=blue]
> OutsiderJustice wrote:
>[color=green]
> > I can not find any information if PHP support multi-thread (Posix
> > thread) or not at all, can someone give out some information? Is it
> > supported? If yes, where's the info? If no, is it possible to make
> > doing multi-thread stuff?[/color]
>
> You can do it, but don't try doing it when it's a script on a webserver.
> Check out the following links (the 1st one is the PHP manual; the 2nd one
> is a link on my website about how to do just this):
>
> http://www.php.net/pcntl
> http://www.electrictoolbox.com/artic...ocess-forking/
>
> Chris[/color]

Unfortunately there are so many problems with it:

- it is not really multi-thread, it's multi-process, it's expensive to
duplicate all resources in the child process
- it is only available on UNIX system; even so, if one forgot to do
'--enable-pcntl' when compiling PHP, one has to compile it again,
which can be a hassle.

I'm not a Windows guy, but I believe Windows also has it's own process
control APIs, so I'm kind of wondering why this is not implemented on
Windows version.

Is there anything may be useful to achieve multi-thread performance on
Windows system?

Yufeng

[Chris Hope]

Re: PHP and Multi-thread

OutsiderJustice wrote:
[color=blue]
> Unfortunately there are so many problems with it:
>
> - it is not really multi-thread, it's multi-process, it's expensive to
> duplicate all resources in the child process
> - it is only available on UNIX system; even so, if one forgot to do
> '--enable-pcntl' when compiling PHP, one has to compile it again,
> which can be a hassle.
>
> I'm not a Windows guy, but I believe Windows also has it's own process
> control APIs, so I'm kind of wondering why this is not implemented on
> Windows version.
>
> Is there anything may be useful to achieve multi-thread performance on
> Windows system?[/color]

Yeah you're right it's not multi-threading proper, which I have done in .NET
with both VB and C#. As far as I have been able to determine there is no
way to do this in PHP other than using process forking. If someone else is
able to help out here I'd be interested to, although I'm coming from a Unix
platform not a Windows one.

Chris

--
Chris Hope
The Electric Toolbox Ltd

http://www.electrictoolbox.com/

[Chung Leong]

Re: PHP and Multi-thread

"OutsiderJustic e" <outsiderjustic e@yahoo.com> wrote in message
news:613e9225.0 404041223.719ea 19d@posting.goo gle.com...[color=blue]
> Chris Hope <blackhole@elec trictoolbox.com > wrote in message[/color]
news:<7xObc.480 6$d%6.87672@new s.xtra.co.nz>.. .[color=blue]
> I'm not a Windows guy, but I believe Windows also has it's own process
> control APIs, so I'm kind of wondering why this is not implemented on
> Windows version.
>
> Is there anything may be useful to achieve multi-thread performance on
> Windows system?[/color]

Take a look at the Win32 extension. In theory you can build a wrapper around
the W32 API. In practice though, it will probably be very unstable--if it
works at all.