Php/docs/function.pg-pconnect
pg_pconnect
(PHP 4, PHP 5, PHP 7)
pg_pconnect — Open a persistent PostgreSQL connection
Description
pg_pconnect
( string $connection_string
[, int $connect_type
] ) : resource
pg_pconnect() opens a connection to a PostgreSQL database. It returns a connection resource that is needed by other PostgreSQL functions.
If a second call is made to pg_pconnect() with
the same connection_string as an existing connection, the
existing connection will be returned unless you pass
PGSQL_CONNECT_FORCE_NEW as
connect_type.
To enable persistent connection, the pgsql.allow_persistent
php.ini directive must be set to "On" (which is the default).
The maximum number of persistent connection can be defined with the pgsql.max_persistent
php.ini directive (defaults to -1 for no limit). The total number
of connections can be set with the pgsql.max_links
php.ini directive.
pg_close() will not close persistent links generated by pg_pconnect().
Parameters
connection_stringThe
connection_stringcan be empty to use all default parameters, or it can contain one or more parameter settings separated by whitespace. Each parameter setting is in the formkeyword = value. Spaces around the equal sign are optional. To write an empty value or a value containing spaces, surround it with single quotes, e.g.,keyword = 'a value'. Single quotes and backslashes within the value must be escaped with a backslash, i.e., \' and \\.The currently recognized parameter keywords are:
host,hostaddr,port,dbname,user,password,connect_timeout,options,tty(ignored),sslmode,requiressl(deprecated in favor ofsslmode), andservice. Which of these arguments exist depends on your PostgreSQL version.connect_typeIf
PGSQL_CONNECT_FORCE_NEWis passed, then a new connection is created, even if theconnection_stringis identical to an existing connection.
Return Values
PostgreSQL connection resource on success, FALSE on failure.
Examples
Example #1 Using pg_pconnect()
<?php$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?>
