Re: PostgreSQL locking from PHP scripts

["Gavin M. Roy" <gmr(at)ehpg(dot)net>]

Well you can use persistent connections.  Instead of pg_connect use  
pg_pconnect.   I don't know if it will keep the lock or not, I've not  
tested, but it seems like you'd need a pretty elaborate connection  
management setup to make sure you're locking and unlocking the  
records for the right client.

On Nov 6, 2006, at 11:05 AM, Alan Hodgson wrote:

> On Thursday 26 October 2006 11:11, Amal burman  
> <amalburman(at)yahoo(dot)com> wrote:
> > postgresql database for this project. Here script one
> > (booking.php) tries to setup a lock for update and ask
> > user to fill-up the form. Now when the user fill-up
> > the form and submit it for update, second script
> > (update.php) update the database and releasing the
> > locks.
>
> You can't do this kind of thing in PHP.  PHP resets the database  
> connection
> between scripts.   The script is finished as soon as the page is  
> delivered
> to the client.
>
> Also, web connections are stateless and there is no way to even  
> know what
> web server process or database connection you'll be getting on  
> subsequent
> page views.
>
> --
> "It is a besetting vice of democracies to substitute public opinion  
> for
> law." - James Fenimore Cooper