<?php
/*
 * Copyright (C) 2000  Tatsuo Ishii
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose and without fee is hereby
 * granted, provided that the above copyright notice appear in all
 * copies and that both that copyright notice and this permission
 * notice appear in supporting documentation, and that the name of the
 * author not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior
 * permission. The author makes no representations about the
 * suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 */

/*
 * PostgreSQLデータベースへの接続を行うクラス。メンバ変数の
 * $dbname,$hostname,$portを必要に応じて継承先のクラスでoverrideして使
 * 用する。
 */
class DbConnect {
  var $dbname = "";	// データベース名(必要に応じて継承先でoverride)
  var $hostname = "";	// ホスト名(必要に応じて継承先でoverride)
  var $port = "";	// ポート番号(必要に応じて継承先でoverride)
  var $con = false;	// コネクションハンドル

  function DbConnect() {	// コンストラクタ
	$this->getConnection();
  }

  // コネクションハンドルを返す
  function getConnection() {
    if ($this->con == false) {
      return($this->doConnect());
    }
    return($this->con);
  }

  function doConnect() {
    // データベースに接続する
//    @$this->con = pg_connect($this->hostname,$this->port,$this->dbname);←削除

	$conn_string = "host={$this->hostname} dbname={$this->dbname} user={$this->user}";
    $this->con = pg_connect($conn_string);
    if ($this->con == false) {
      print("データベース $this->dbname に接続できませんでした。");
      exit;
    }
    return($this->con);
  }

  // データベースとの接続切断
  function doClose() {
    if ($this->con != false) {
      pg_close($this->con);
      $this->con = false;
    }
  }
}
?>