How to connect from php to PostgreSQL?

Question

PHP

Created a file

<?php
$host = 'localhost';
$db = 'Base';
$user = 'postgres';
$pass = '';
$connection = pg_connect("host=" . $host . " dbname=" . $db ." user=" .$user . " password=" . $pass);
$GLOBALS['link'] = $connection;
?>

In the main file I do:

include 'dbConnect.php';

function auth($login){
  //$dbconn = pg_connect("host=localhost dbname=Base user=postgres password=");
  $result = pg_query($GLOBALS['link'], "Select id from \"Users_auth\" where nick= '" . $login . "'");
  pg_close($GLOBALS['link']);
  return $result;
}

Gives out:

Warning: pg_query(): supplied resource is not a valid PostgreSQL link resource in \localhost\connect.php on line 65

Warning: pg_close(): supplied resource is not a valid PostgreSQL link resource in \localhost\connect.php on line 66

Warning: pg_fetch_result() expects parameter 1 to be resource, boolean given in \localhost\connect.php on line 101