db.inc
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<?php
/**
* $Id$
*
* The default database wrapper class.
*
* Copyright (c) 2003 Jam Warehouse http://www.jamwarehouse.com
*
* This program 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.
*
* This program 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
*
* @version $Revision$
* @author Mukhtar Dharsey, Jam Warehouse (Pty) Ltd, South Africa
* @package lib.database
*/
class Database extends DB_Sql {
/** Class name */
var $classname = "Database";
/** Host name. Retrieved from config/environment.php */
var $Host = "";
/** Database name */
var $Database = "";
/** Database user */
var $User = "";
/** Database user password */
var $Password = "";
/** Query to execute */
var $sQuery;
/** Name of table last query was executed on*/
var $sLastTableName;
/** Where clause last used in query execution */
var $sLastWhereClause;
/** Order by clause last used in query execution */
var $sLastOrderByClause;
/** Default Constructor */
function Database() {
global $default;
$this->Host = $default->dbHost;
$this->Database = $default->dbName;
$this->User = $default->dbUser;
$this->Password = $default->dbPass;
}
// END wes changes
/**
* Create a query from the provided paramaters. The ID column
* is seleted by default
*
* @param $sTableName Table to query
* @param $aColumns Columns in table
* @param $sWhereClause Where clause (optional)
* @param $sOrderByClause Order by clause (optional)
*/
function createSQLQuery($sTableName, $aColumns, $sWhereClause = null, $sOrderByClause = null) {
$this->sLastTableName = $sTableName;
$this->sLastWhereCluase = $sWhereClause;
$this->sLastOrderByClause = $sOrderByClause;
$this->sQuery = "SELECT ID, ";
for( $i = 0; $i < count($aColumns) - 1; $i++ ) {
$this->sQuery = $this->sQuery . $aColumns[$i] . ",";
}
$this->sQuery .= $aColumns[count($aColumns) - 1] . " ";
$this->sQuery .= "FROM " . $sTableName . " ";
if (isset($sWhereClause)) {
$this->sQuery .= "WHERE " . $sWhereClause . " ";
}
if (isset($sOrderByClause)) {
$this->sQuery .= "ORDER BY " . $sOrderByClause . " ";
}
$this->query($this->sQuery);
}
/**
Create a query from the provided paramaters, specifying a limit and an offset.
The ID column is selected by default
@param $sTableName Table to query
@param $aColumns Columns in table
@param $iOffset Offset
@param $iLimit Limit
@param $sWhereClause Where clause (optional)
@param $sOrderByClause Order by clause (optional)
*/
function createSQLQueryWithOffset($sTableName, $aColumns, $iOffset, $iLimit, $sWhereClause = null, $sOrderByClause = null) {
$this->sLastTableName = $sTableName;
$this->sLastWhereCluase = $sWhereClause;
$this->sLastOrderByClause = $sOrderByClause;
$this->sQuery = "SELECT ID, ";
for( $i = 0; $i < count($aColumns) - 1; $i++ ) {
$this->sQuery = $this->sQuery . $aColumns[$i] . ",";
}
$this->sQuery .= $aColumns[count($aColumns) - 1] . " ";
$this->sQuery .= "FROM " . $sTableName . " ";
if (isset($sWhereClause)) {
$this->sQuery .= "WHERE " . $sWhereClause . " ";
}
if (isset($sOrderByClause)) {
$this->sQuery .= "ORDER BY " . $sOrderByClause . " ";
}
$this->sQuery .= "LIMIT " . $iOffset . ", " . $iLimit;
$this->query($this->sQuery);
}
/**
* Get the result count for the previously executed query. Meant
* to be used in conjuction with createSSQLQueryWithOffset so that
* the total number of results can be calculated
*
* @return int row count
*/
function & getLastQueryResultCount() {
if (isset($this->sLastTableName)) {
$sCountResultQuery = "SELECT COUNT(*) AS ResultCount FROM " . $this->sLastTableName;
if (isset($this->sLastWhereClause)) {
sCountResultQuery . " WHERE " . $this->sLastWhereClause;
}
$this->query($sCountResultQuery);
$this->next_record();
return $this->f("ResultCount");
} else {
return 0;
}
}
/**
* Execute the query and return the results
*
* @returns Results of query
*/
function & getQueryResults() {
$result = null;
if (isset($this->sQuery)) {
$result = $this->query($this->sQuery);
}
return $result;
}
/**
* Display any database errors encountered
*/
function haltmsg($msg) {
printf("</td></table><b>Database error:</b> %s<br>\n", $msg);
printf("<b>SQL Error</b>: %s (%s)<br>\n",$this->Errno, $this->Error);
}
}
?>