Re: PHP postgres connections

Hi,

On 4/29/05, Mauro Bertoli <bertolima(at)yahoo(dot)it> wrote:
> I need to connect to 2 differents Postgres 8.0.0
> databases located in the same machine using the same
> PHP script with an "db wrapper object" instance
> (pg_Connect)... simply a PHP page with contemporarily
> 2 database connections...

Firstly some extra information from php.net:

{{{
[http://tr.php.net/pg_connect]
resource pg_connect ( string connection_string [, int connect_type] )
...
If a second call is made to pg_connect() with the same connection_string,
no new connection will be established unless you pass
SQL_CONNECT_FORCE_NEW as connect_type, but instead, the connection
resource of the already opened connection will be returned. You can have
multiple connections to the same database if you use different connection
strings.
}}}

Here's a simple db wrapper class for 2 different db connections:

class dbw
{
/* Connection parameter variables. */
var connParam1;
var connParam2;

function dbw()
{
/* Assigning values to conn. params. */
$this->connParam1 = "...";
$this->connParam2 = "...";
}

function connect($connParam)
{
/* Pay attention to SQL_CONNECT_FORCE_NEW parameter. */
return pg_connect($connParam, SQL_CONNECT_FORCE_NEW);
}

/* ... */
}

/* Creating DB Wrapper */
$dbw = new dbw();

/*
* If we're not happy with the current connParam1 value:
* $dbw->connParam1 = "...";
*/

$dbConn1 = $dbw->connect($dbw->connParam1);
$dbConn2 = $dbw->connect($dbw->connParam2);

> Can I use however persistent connections ?

Yep. Just replace pg_connect line in the code with pg_pconnect. But I
(as PHP team) don't recommend using persistent connections. Please
read "Persistent Database Connections" [1] before deciding to use.

[1] http://php.net/manual/en/features.persistent-connections.php

Regards.

P.S. Next time, please try to use pgsql-php listen for PHP related questions.