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# pg_connect

(PHP 3, PHP 4, PHP 5)

pg_connect -- Open a PostgreSQL connection

## Description

resource pg_connect ( string connection_string [, int connect_type] )

pg_connect() opens a connection to a PostgreSQL database specified by the connection_string.

If a second call is made to pg_connect() 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.

The old syntax with multiple parameters $conn = pg_connect("host", "port", "options", "tty", "dbname") has been deprecated.

## 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_connect()
`<?php $dbconn = pg_connect("dbname=mary"); //connect to a database named "mary" $dbconn2 = pg_connect("host=localhost port=5432 dbname=mary"); // connect to a database named "mary" on "localhost" at port "5432" $dbconn3 = pg_connect("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"; $dbconn4 = pg_connect($conn_string); //connect to a database named "test" on the host "sheep" with a username and password ?>`

## See Also

pg_pconnect()
pg_close()
pg_host()
pg_port()
pg_tty()
pg_options()
pg_dbname()

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