function pdo_pgsql($sql){

    $host = '000.000.000.000';
    $user = 'user';
    $pass = 'pass';
    $db   = 'db';

    try {
        $PDO = new PDO( 'pgsql:host=' . $host . ';dbname=' . $db . ';port=5432', $user, $pass, array(
            PDO::ATTR_PERSISTENT => true
        ));
    }
    catch ( PDOException $e ) {
        echo 'Error: ' . $e->getMessage(); exit;
    }

    $result = $PDO->query( $sql );

    if (is_array($result)){
        $row = $result->fetchAll( PDO::FETCH_ASSOC );
    }else{
        $row = $result;
    }

    return $row;

}