... pg_connect() returns a connection resource that is needed by other PostgreSQL functions. pg_connect() opens a connection to a PostgreSQL database specified by connection_string . ... 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 ...