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Website Programming in PHP / MYSQL
pg_connect
(PHP 4, PHP 5)
pg_connect — Open a PostgreSQL connection
Description
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
?>
