pg_pconnect
(PHP 4, PHP 5)
pg_pconnect — Open a persistent PostgreSQL connection
Description
resource pg_pconnect
( string $connection_string
[, int $connect_type
] )
If a second call is made to pg_pconnect() with
the same connection_string
as an existing connection, the
existing connection will be returned unless you pass
PGSQL_CONNECT_FORCE_NEW as
connect_type
.
To enable persistent connection, the pgsql.allow_persistent
php.ini directive must be set to "On" (which is the default).
The maximum number of persistent connection can be defined with the pgsql.max_persistent
php.ini directive (defaults to -1 for no limit). The total number
of connections can be set with the pgsql.max_links
php.ini directive.
pg_close() will not close persistent links
generated by pg_pconnect().
Parameters
-
connection_string
-
The connection_string
can be empty to use all default parameters, or it
can contain one or more parameter settings separated by whitespace.
Each parameter setting is in the form keyword = value. Spaces around
the equal sign are optional. To write an empty value or a value
containing spaces, surround it with single quotes, e.g., keyword =
'a value'. Single quotes and backslashes within the value must be
escaped with a backslash, i.e., \' and \\.
The currently recognized parameter keywords are:
host
, hostaddr
, port
,
dbname
, user
,
password
, connect_timeout
,
options
, tty
(ignored), sslmode
,
requiressl
(deprecated in favor of sslmode
), and
service
. Which of these arguments exist depends
on your PostgreSQL version.
-
connect_type
-
If PGSQL_CONNECT_FORCE_NEW is passed, then a new connection
is created, even if the connection_string
is identical to
an existing connection.
Return Values
PostgreSQL connection resource on success, FALSE on failure.
Examples
Example #1 Using pg_pconnect()
<?php
$dbconn = pg_pconnect("dbname=mary");
//connect to a database named "mary"
$dbconn2 = pg_pconnect("host=localhost port=5432 dbname=mary");
// connect to a database named "mary" on "localhost" at port "5432"
$dbconn3 = pg_pconnect("host=sheep port=5432 dbname=mary user=lamb password=foo");
//connect to a database named "mary" on the host "sheep" with a username and password
$conn_string = "host=sheep port=5432 dbname=test user=lamb password=bar";
$dbconn4 = pg_pconnect($conn_string);
//connect to a database named "test" on the host "sheep" with a username and password
?>
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