php如何连接postgresql

pg_connect ( string $connection_string ) : resource

<?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

?>