<?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))
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($str)
{
if (is_array($str))
return '';
else 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;
}
}