source: trunk/web/punbb/include/dblayer/mysql.php @ 3

<?php
/***********************************************************************

  Copyright (C) 2002-2005  Rickard Andersson (rickard@punbb.org)

  This file is part of PunBB.

  PunBB is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published
  by the Free Software Foundation; either version 2 of the License,
  or (at your option) any later version.

  PunBB is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  MA  02111-1307  USA

************************************************************************/


// Make sure we have built in support for MySQL
if (!function_exists('mysql_connect'))
        exit('This PHP environment doesn\'t have MySQL support built in. MySQL support is required if you want to use a MySQL database to run this forum. Consult the PHP documentation for further assistance.');


class DBLayer
{
        var $prefix;
        var $link_id;
        var $query_result;

        var $saved_queries = array();
        var $num_queries = 0;


        function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect)
        {
                $this->prefix = $db_prefix;

                if ($p_connect)
                        $this->link_id = @mysql_pconnect($db_host, $db_username, $db_password);
                else
                        $this->link_id = @mysql_connect($db_host, $db_username, $db_password);

                if ($this->link_id)
                {
                        if (@mysql_select_db($db_name, $this->link_id))
                        { mysql_query("SET NAMES utf8");
                                return $this->link_id;
                   }
                        else
                                error('Unable to select database. MySQL reported: '.mysql_error(), __FILE__, __LINE__);
                }
                else
                        error('Unable to connect to MySQL server. MySQL reported: '.mysql_error(), __FILE__, __LINE__);
        }


        function start_transaction()
        {
                return;
        }


        function end_transaction()
        {
                return;
        }


        function query($sql, $unbuffered = false)
        {
                if (defined('PUN_SHOW_QUERIES'))
                        $q_start = get_microtime();

                if ($unbuffered)
                        $this->query_result = @mysql_unbuffered_query($sql, $this->link_id);
                else
                        $this->query_result = @mysql_query($sql, $this->link_id);

                if ($this->query_result)
                {
                        if (defined('PUN_SHOW_QUERIES'))
                                $this->saved_queries[] = array($sql, sprintf('%.5f', get_microtime() - $q_start));

                        ++$this->num_queries;

                        return $this->query_result;
                }
                else
                {
                        if (defined('PUN_SHOW_QUERIES'))
                                $this->saved_queries[] = array($sql, 0);

                        return false;
                }
        }


        function result($query_id = 0, $row = 0)
        {
                return ($query_id) ? @mysql_result($query_id, $row) : false;
        }


        function fetch_assoc($query_id = 0)
        {
                return ($query_id) ? @mysql_fetch_assoc($query_id) : false;
        }


        function fetch_row($query_id = 0)
        {
                return ($query_id) ? @mysql_fetch_row($query_id) : false;
        }


        function num_rows($query_id = 0)
        {
                return ($query_id) ? @mysql_num_rows($query_id) : false;
        }


        function affected_rows()
        {
                return ($this->link_id) ? @mysql_affected_rows($this->link_id) : false;
        }


        function insert_id()
        {
                return ($this->link_id) ? @mysql_insert_id($this->link_id) : false;
        }


        function get_num_queries()
        {
                return $this->num_queries;
        }


        function get_saved_queries()
        {
                return $this->saved_queries;
        }


        function free_result($query_id = false)
        {
                return ($query_id) ? @mysql_free_result($query_id) : false;
        }


        function escape($str)
        {
                if (function_exists('mysql_real_escape_string'))
                        return mysql_real_escape_string($str, $this->link_id);
                else
                        return mysql_escape_string($str);
        }


        function error()
        {
                $result['error_sql'] = @current(@end($this->saved_queries));
                $result['error_no'] = @mysql_errno($this->link_id);
                $result['error_msg'] = @mysql_error($this->link_id);

                return $result;
        }


        function close()
        {
                if ($this->link_id)
                {
                        if ($this->query_result)
                                @mysql_free_result($this->query_result);

                        return @mysql_close($this->link_id);
                }
                else
                        return false;
        }
}