class PGDB
{
  var $link;
   var $result;
  var $num_of_rows;
  function PGDB($database)
  {
    $this->dbname=$database;
    $connect_string="host=".$this->host." port=5432 dbname=".$this->dbname." user=".$this->username." password=".$this->password;
    $this->link = pg_connect($connect_string) or die("Try again later.");
    }
    function query($query,$return='1')
    {
    $this->result=pg_exec($query) or die("Invalid to execute:
".$query."");
    if($return=='1')
    {
      $this->num_of_rows=pg_numrows($this->result);
    }
    return $result;
  } ...
}