<?php
/*
 * e107 website system
 *
 * Copyright (C) 2001-2008 e107 Inc (e107.org)
 * Released under the terms and conditions of the
 * GNU General Public License (http://www.gnu.org/licenses/gpl.txt)
 *
 * mySQL Handler
 *
 * $Source: /cvs_backup/e107_0.8/e107_handlers/mysql_class.php,v $
 * $Revision: 1.38 $
 * $Date: 2009-05-24 15:34:37 $
 * $Author: e107steved $
*/

if(defined('MYSQL_LIGHT'))
{
	class dummyTraffic {
		function Bump() { return; }
		function BumpWho() { return; }
		function TimeDelta() { return; }
	}
	$eTraffic = new dummyTraffic;
	define('E107_DEBUG_LEVEL', 0);
	define('e_QUERY', '');
	$path = (MYSQL_LIGHT !== true ? MYSQL_LIGHT : '');
	require_once($path.'e107_config.php');
	define('MPREFIX', $mySQLprefix);
	$sql = new db;
	$sql->db_Connect($mySQLserver, $mySQLuser, $mySQLpassword, $mySQLdefaultdb);
}
else
{
	if (!defined('e107_INIT')) { exit; }
}

$db_time = 0.0;				// Global total time spent in all db object queries
$db_mySQLQueryCount = 0;	// Global total number of db object queries (all db's)

$db_ConnectionID = NULL;	// Stores ID for the first DB connection used - which should be the main E107 DB - then used as default

/**
* MySQL Abstraction class
*
* @package e107
* @version $Revision: 1.38 $
* @author $Author: e107steved $
*/
class db {

	var $mySQLserver;
	var $mySQLuser;
	var $mySQLpassword;
	var $mySQLdefaultdb;
	var $mySQLPrefix;
	var $mySQLaccess;
	var $mySQLresult;
	var $mySQLrows;
	var $mySQLerror;			// Error reporting mode - TRUE shows messages
	var	$mySQLlastErrNum;		// Number of last error
	var	$mySQLlastErrText;		// Text of last error (empty string if no error)
	var $mySQLcurTable;
	var $mySQLlanguage;
	var $mySQLinfo;
	var $tabset;

	var $total_results;			// Total number of results

	/**
	* @return db
	* @desc db constructor gets language options from the cookie or session
	* @access public
	*/
	function db()
	{
		global $pref, $eTraffic, $db_defaultPrefix;
		$eTraffic->BumpWho('Create db object', 1);
		$this->mySQLPrefix = MPREFIX;				// Set the default prefix - may be overridden
		$langid = 'e107language_'.$pref['cookie_name'];
		if ($pref['user_tracking'] == 'session')
		{
			if (!isset($_SESSION[$langid])) { return; }
			$this->mySQLlanguage = $_SESSION[$langid];
		}
		else
		{
			if (!isset($_COOKIE[$langid])) { return; }
			$this->mySQLlanguage = $_COOKIE[$langid];
		}
	}

	/**
	* @return null or string error code
	* @param string $mySQLserver IP Or hostname of the MySQL server
	* @param string $mySQLuser MySQL username
	* @param string $mySQLpassword MySQL Password
	* @param string $mySQLdefaultdb The database schema to connect to
	* @desc Connects to mySQL server and selects database - generally not required if your table is in the main DB.<br />
	* <br />
	* Example using e107 database with variables defined in config.php:<br />
	* <code>$sql = new db;
	* $sql->db_Connect($mySQLserver, $mySQLuser, $mySQLpassword, $mySQLdefaultdb);</code>
	* <br />
	* OR to connect an other database:<br />
	* <code>$sql = new db;
	* $sql->db_Connect('url_server_database', 'user_database', 'password_database', 'name_of_database');</code>
	*
	* @access public
	*/
	function db_Connect($mySQLserver, $mySQLuser, $mySQLpassword, $mySQLdefaultdb, $newLink = FALSE, $mySQLPrefix = MPREFIX)
	{
	  global $eTraffic, $db_ConnectionID, $db_defaultPrefix;
	  $eTraffic->BumpWho('db Connect', 1);

	  $this->mySQLserver = $mySQLserver;
	  $this->mySQLuser = $mySQLuser;
	  $this->mySQLpassword = $mySQLpassword;
	  $this->mySQLdefaultdb = $mySQLdefaultdb;
	  $this->mySQLPrefix = $mySQLPrefix;

	  $temp = $this->mySQLerror;
	  $this->mySQLerror = FALSE;
	  if(defined("USE_PERSISTANT_DB") && USE_PERSISTANT_DB == true)
	  {
		if (!$this->mySQLaccess = @mysql_pconnect($this->mySQLserver, $this->mySQLuser, $this->mySQLpassword)) 	// No persistent link parameter permitted
		{
		  return 'e1';
		}
	  }
	  else
	  {
		if (!$this->mySQLaccess = @mysql_connect($this->mySQLserver, $this->mySQLuser, $this->mySQLpassword, $newLink))
		{
		  return 'e1';
		}
	  }

	  if (!@mysql_select_db($this->mySQLdefaultdb,$this->mySQLaccess))
	  {
		return 'e2';
	  }

	  $this->dbError('dbConnect/SelectDB');

	  if ($db_ConnectionID == NULL) $db_ConnectionID = $this->mySQLaccess;		// Save the connection resource
	  return TRUE;
	}


	/**
	* @return void
	* @param unknown $sMarker
	* @desc Enter description here...
	* @access private
	*/
	function db_Mark_Time($sMarker)
	{
		if (E107_DEBUG_LEVEL > 0)
		{
			global $db_debug;
			$db_debug->Mark_Time($sMarker);
		}
	}


	/**
	* @return void
	* @desc Enter description here...
	* @access private
	*/
	function db_Show_Performance() 
	{
		return $db_debug->Show_Performance();
	}


	/**
	* @return void
	* @desc add query to dblog table
	* @access private
	*/
	function db_Write_log($log_type = '', $log_remark = '', $log_query = '') 
	{
		global $tp, $e107;
		list($time_usec, $time_sec) = explode(" ", microtime());
		$uid = (USER) ? USERID : '0';
		$userstring = ( USER === true ? USERNAME : "LAN_ANONYMOUS");
		$ip = $e107->getip();
		$qry = $tp->toDB($log_query);
		$this->db_Insert('dblog', "0, {$time_sec}, {$time_usec}, '{$log_type}', 'DBDEBUG', {$uid}, '{$userstring}', '{$ip}', '', '{$log_remark}', '{$qry}'");
	}


	/**
	* @return unknown
	* @param unknown $query
	* @param unknown $rli
	* @desc Enter description here...
	* @access private
	* This is the 'core' routine which handles much of the interface between other functions and the DB
	*/
	function db_Query($query, $rli = NULL, $qry_from = '', $debug = FALSE, $log_type = '', $log_remark = '') 
	{
		global $db_time,$db_mySQLQueryCount,$queryinfo, $eTraffic;
		$db_mySQLQueryCount++;

		if ($debug == 'now') 
		{
			echo "** $query<br />\n";
		}
		if ($debug !== FALSE || strstr(e_QUERY, 'showsql'))
		{
			$queryinfo[] = "<b>{$qry_from}</b>: $query";
		}
		if ($log_type != '') 
		{
			$this->db_Write_log($log_type, $log_remark, $query);
		}

		if(!$this->mySQLaccess)
		{
			global $db_ConnectionID;
        	$this->mySQLaccess = $db_ConnectionID;
		}

		$b = microtime();
		$sQryRes = is_null($rli) ? @mysql_query($query,$this->mySQLaccess) : @mysql_query($query, $rli);
		$e = microtime();

		$eTraffic->Bump('db_Query', $b, $e);
		$mytime = $eTraffic->TimeDelta($b,$e);
		$db_time += $mytime;
		$this->mySQLresult = $sQryRes;

		if ((strpos($query,'SQL_CALC_FOUND_ROWS') !== FALSE) && (strpos($query,'SELECT') !== FALSE))
		{	// Need to get the total record count as well. Return code is a resource identifier
			// Have to do this before any debug action, otherwise this bit gets messed up
			$fr = mysql_query("SELECT FOUND_ROWS()", $this->mySQLaccess);
			$rc = mysql_fetch_array($fr);
			$this->total_results = $rc['FOUND_ROWS()'];
		}

		if (E107_DEBUG_LEVEL) 
		{
			global $db_debug;
			$aTrace = debug_backtrace();
			$pTable = $this->mySQLcurTable;
			if (!strlen($pTable)) {
				$pTable = '(complex query)';
			} else {
				$this->mySQLcurTable = ''; // clear before next query
			}
			if(is_object($db_debug)) 
			{
				$buglink = is_null($rli) ? $this->mySQLaccess : $rli;
			   	$nFields = $db_debug->Mark_Query($query, $buglink, $sQryRes, $aTrace, $mytime, $pTable);
			} 
			else 
			{
				echo "what happened to db_debug??!!<br />";
			}
		}
		return $sQryRes;
	}


	/**
	* @return int Number of rows or false on error
	*
	* @param string $table Table name to select data from
	* @param string $fields Table fields to be retrieved, default * (all in table)
	* @param string $arg Query arguments, default null
	* @param string $mode Argument has WHERE or not, default=default (WHERE)
	*
	* @param bool $debug Debug mode on or off
	*
	* @desc Perform a mysql_query() using the arguments suplied by calling db::db_Query()<br />
	* <br />
	* If you need more requests think to call the class.<br />
	* <br />
	* Example using a unique connection to database:<br />
	* <code>$sql->db_Select("comments", "*", "comment_item_id = '$id' AND comment_type = '1' ORDER BY comment_datestamp");</code><br />
	* <br />
	* OR as second connection:<br />
	* <code>$sql2 = new db;
	* $sql2->db_Select("chatbox", "*", "ORDER BY cb_datestamp DESC LIMIT $from, ".$view, 'no_where');</code>
	*
	* @access public
	*/
	function db_Select($table, $fields = '*', $arg = '', $mode = 'default', $debug = FALSE, $log_type = '', $log_remark = '')
	{
		global $db_mySQLQueryCount;

		$table = $this->db_IsLang($table);
		$this->mySQLcurTable = $table;
		if ($arg != '' && $mode == 'default')
		{
			if ($this->mySQLresult = $this->db_Query('SELECT '.$fields.' FROM '.$this->mySQLPrefix.$table.' WHERE '.$arg, NULL, 'db_Select', $debug, $log_type, $log_remark)) 
			{
				$this->dbError('dbQuery');
				return $this->db_Rows();
			} 
			else 
			{
				$this->dbError("db_Select (SELECT $fields FROM ".$this->mySQLPrefix."{$table} WHERE {$arg})");
				return FALSE;
			}
		} 
		elseif ($arg != '' && $mode != 'default') 
		{
			if ($this->mySQLresult = $this->db_Query('SELECT '.$fields.' FROM '.$this->mySQLPrefix.$table.' '.$arg, NULL, 'db_Select', $debug, $log_type, $log_remark)) 
			{
				$this->dbError('dbQuery');
				return $this->db_Rows();
			} 
			else 
			{
				$this->dbError("db_Select (SELECT {$fields} FROM ".$this->mySQLPrefix."{$table} {$arg})");
				return FALSE;
			}
		} 
		else 
		{
			if ($this->mySQLresult = $this->db_Query('SELECT '.$fields.' FROM '.$this->mySQLPrefix.$table, NULL, 'db_Select', $debug, $log_type, $log_remark)) 
			{
				$this->dbError('dbQuery');
				return $this->db_Rows();
			} 
			else 
			{
				$this->dbError("db_Select (SELECT {$fields} FROM ".$this->mySQLPrefix."{$table})");
				return FALSE;
			}
		}
	}


	/**
	* @return int Last insert ID or false on error
	* @param string $table
	* @param string $arg
	* @param string $debug
	* @desc Insert a row into the table<br />
	* <br />
	* Example:<br />
	* <code>$sql->db_Insert("links", "0, 'News', 'news.php', '', '', 1, 0, 0, 0");</code>
	*
	* @access public
	*/
	function db_Insert($table, $arg, $debug = FALSE, $log_type = '', $log_remark = '')
	{
		$table = $this->db_IsLang($table);
		$this->mySQLcurTable = $table;
		if(is_array($arg))
		{
			if(!isset($arg['_FIELD_TYPES']) && !isset($arg['data']))
			{
		   	//Convert data if not using 'new' format
				$_tmp = array();
				$_tmp['data'] = $arg;
				$arg = $_tmp;
				unset($_tmp);
			}
			if(!isset($arg['data'])) { return false; }

			$fieldTypes = $this->_getTypes($arg);
			$keyList= '`'.implode('`,`', array_keys($arg['data'])).'`';
			$tmp = array();
			foreach($arg['data'] as $fk => $fv)
			{
				$tmp[] = $this->_getFieldValue($fk, $fv, $fieldTypes);
			}
			$valList= implode(', ', $tmp);
			unset($tmp);
			$query = "INSERT INTO `".$this->mySQLPrefix."{$table}` ({$keyList}) VALUES ({$valList})";
		}
		else
		{
			$query = 'INSERT INTO '.$this->mySQLPrefix."{$table} VALUES ({$arg})";
		}

		if(!$this->mySQLaccess)
		{
			global $db_ConnectionID;
			$this->mySQLaccess = $db_ConnectionID;
		}

		if ($result = $this->mySQLresult = $this->db_Query($query, NULL, 'db_Insert', $debug, $log_type, $log_remark ))
		{
			$tmp = mysql_insert_id($this->mySQLaccess);
			$this->dbError('db_Insert');
			return ($tmp) ? $tmp : TRUE; // return true even if table doesn't have auto-increment.
		}
		else
		{
			$this->dbError("db_Insert ({$query})");
			return FALSE;
		}
	}


	/**
	* @return int number of affected rows, or false on error
	* @param string $table
	* @param string $arg
	* @param bool $debug
	* @desc Update fields in ONE table of the database corresponding to your $arg variable<br />
	* <br />
	* Think to call it if you need to do an update while retrieving data.<br />
	* <br />
	* Example using a unique connection to database:<br />
	* <code>$sql->db_Update("user", "user_viewed='$u_new' WHERE user_id='".USERID."' ");</code>
	* <br />
	* OR as second connection<br />
	* <code>$sql2 = new db;
	* $sql2->db_Update("user", "user_viewed = '$u_new' WHERE user_id = '".USERID."' ");</code><br />
	*
	* @access public
	*/
	function db_Update($table, $arg, $debug = FALSE, $log_type = '', $log_remark = '')
	{
		$table = $this->db_IsLang($table);
		$this->mySQLcurTable = $table;

		if(!$this->mySQLaccess)
		{
			global $db_ConnectionID;
			$this->mySQLaccess = $db_ConnectionID;
		}

  	if (is_array($arg))  // Remove the need for a separate db_UpdateArray() function.
  	{
	   	$new_data = '';
		if(!isset($arg['_FIELD_TYPES']) && !isset($arg['data']))
	   	{
		   	//Convert data if not using 'new' format (is this needed?)
	   		$_tmp = array();
	   		if(isset($arg['WHERE']))
	   		{
	   			$_tmp['WHERE'] = $arg['WHERE'];
	   			unset($arg['WHERE']);
	   		}
	   		$_tmp['data'] = $arg;
	   		$arg = $_tmp;
	   		unset($_tmp);
	   	}
	   	if(!isset($arg['data'])) { return false; }

			$fieldTypes = $this->_getTypes($arg);
			foreach ($arg['data'] as $fn => $fv)
			{
				$new_data .= ($new_data ? ', ' : '');
				$new_data .= "`{$fn}`=".$this->_getFieldValue($fn, $fv, $fieldTypes);
			}
			$arg = $new_data .(isset($arg['WHERE']) ? ' WHERE '. $arg['WHERE'] : '');
		}

		if ($result = $this->mySQLresult = $this->db_Query('UPDATE '.$this->mySQLPrefix.$table.' SET '.$arg, NULL, 'db_Update', $debug, $log_type, $log_remark))
		{
			$result = mysql_affected_rows($this->mySQLaccess);
			$this->dbError('db_Update');
			if ($result == -1) { return false; }	// Error return from mysql_affected_rows
			return $result;
		}
		else
		{
			$this->dbError("db_Update ({$query})");
			return FALSE;
		}
	}

	function _getTypes(&$arg)
	{
		if(isset($arg['_FIELD_TYPES']))
		{
			if(!isset($arg['_FIELD_TYPES']['_DEFAULT']))
			{
				$arg['_FIELD_TYPES']['_DEFAULT'] = 'todb';
			}
			$fieldTypes = $arg['_FIELD_TYPES'];
			unset($arg['_FIELD_TYPES']);
		}
		else
		{
			$fieldTypes = array();
			$fieldTypes['_DEFAULT'] = 'string';
		}
		return $fieldTypes;
	}

	/**
	* @return mixed
	* @param string|array $fieldValue
	* @desc Return new field value in proper format<br />
	*
	* @access private
	*/
	function _getFieldValue($fieldKey, $fieldValue, &$fieldTypes)
	{
		if($fieldValue === '_NULL_') { return 'NULL';}
		$type = (isset($fieldTypes[$fieldKey]) ? $fieldTypes[$fieldKey] : $fieldTypes['_DEFAULT']);

		switch ($type)
		{
			case 'int':
				return (int)$fieldValue;
				break;

			case 'cmd':
				return $fieldValue;
				break;

			case 'string':
				return "'{$fieldValue}'";
				break;

			case 'escape':
				return "'".mysql_real_escape_string($fieldValue)."'";
				break;

			case 'todb':
			default:
				if($fieldValue == '') { return "''"; }
				$e107 = e107::getInstance();
				return "'".$e107->tp->toDB($fieldValue)."'";
				break;
	  	}
	}

	/* Similar to db_Update(), but splits the variables and the 'WHERE' clause.
		$vars may be an array (fieldname=>newvalue) of fields to be updated, or a simple list.
		$arg is usually a 'WHERE' clause
		The way the code is written at the moment, a call to db_Update() with just the first two parameters specified can be
			converted simply by changing the function name - it will still work.
		Deprecated routine - use db_Update() with array parameters
	*/
	function db_UpdateArray($table, $vars, $arg='', $debug = FALSE, $log_type = '', $log_remark = '')
	{
	  $table = $this->db_IsLang($table);
	  $this->mySQLcurTable = $table;

	  if(!$this->mySQLaccess)
	  {
		global $db_ConnectionID;
        $this->mySQLaccess = $db_ConnectionID;
	  }

	  $new_data = '';
	  if (is_array($vars))
	  {
		$spacer = '';
		foreach ($vars as $fn => $fv)
		{
		  $new_data .= $spacer."`{$fn}`='{$fv}'";
		  $spacer = ', ';
		}
		$vars = '';
	  }
	  if ($result = $this->mySQLresult = $this->db_Query('UPDATE '.$this->mySQLPrefix.$table.' SET '.$new_data.$vars.' '.$arg, NULL, 'db_UpdateArray', $debug, $log_type, $log_remark))
	  {
		$result = mysql_affected_rows($this->mySQLaccess);
		if ($result == -1) return FALSE;	// Error return from mysql_affected_rows
		return $result;
	  }
	  else
	  {
		$this->dbError("db_Update ($query)");
		return FALSE;
	  }
	}

	/**
	* @return array MySQL row
	* @param string $mode
	* @desc Fetch an array containing row data (see PHP's mysql_fetch_array() docs)<br />
	* <br />
	* Example :<br />
	* <code>while($row = $sql->db_Fetch()){
	*  $text .= $row['username'];
	* }</code>
	*
	* @access public
	*/
	function db_Fetch($type = MYSQL_ASSOC) 
	{
		global $eTraffic;
		if (!(is_int($type))) 
		{
			$type=MYSQL_ASSOC;
		}
		$b = microtime();
		$row = @mysql_fetch_array($this->mySQLresult,$type);
		$eTraffic->Bump('db_Fetch', $b);
		if ($row) 
		{
			$this->dbError('db_Fetch');
			return $row;
		} 
		else 
		{
			$this->dbError('db_Fetch');
			return FALSE;
		}
	}

	/**
	* @return int number of affected rows or false on error
	* @param string $table
	* @param string $fields
	* @param string $arg
	* @desc Count the number of rows in a select<br />
	* <br />
	* Example:<br />
	* <code>$topics = $sql->db_Count("forum_t", "(*)", " WHERE thread_forum_id='".$forum_id."' AND thread_parent='0' ");</code>
	*
	* @access public
	*/
	function db_Count($table, $fields = '(*)', $arg = '', $debug = FALSE, $log_type = '', $log_remark = '') 
	{
		$table = $this->db_IsLang($table);

		if ($fields == 'generic') 
		{
			$query=$table;
			if ($this->mySQLresult = $this->db_Query($query, NULL, 'db_Count', $debug, $log_type, $log_remark)) 
			{
				$rows = $this->mySQLrows = @mysql_fetch_array($this->mySQLresult);
				$this->dbError('db_Count');
				return $rows['COUNT(*)'];
			} 
			else 
			{
				$this->dbError("db_Count ({$query})");
				return FALSE;
			}
		}

		$this->mySQLcurTable = $table;
		$query='SELECT COUNT'.$fields.' FROM '.$this->mySQLPrefix.$table.' '.$arg;
		if ($this->mySQLresult = $this->db_Query($query, NULL, 'db_Count', $debug, $log_type, $log_remark)) 
		{
			$rows = $this->mySQLrows = @mysql_fetch_array($this->mySQLresult);
			$this->dbError('db_Count');
			return $rows[0];
		} 
		else 
		{
			$this->dbError("db_Count({$query})");
			return FALSE;
		}
	}


	/**
	* @return void
	* @desc Closes the mySQL server connection.<br />
	* <br />
	* Only required if you open a second connection.<br />
	* Native e107 connection is closed in the footer.php file<br />
	* <br />
	* Example :<br />
	* <code>$sql->db_Close();</code>
	*
	* @access public
	*/
	function db_Close() 
	{
		global $eTraffic;
		if(!$this->mySQLaccess)
		{
			global $db_ConnectionID;
        	$this->mySQLaccess = $db_ConnectionID;
		}
		$eTraffic->BumpWho('db Close', 1);
		$this->mySQLaccess = NULL; // correct way to do it when using shared links.
		$this->dbError('dbClose');
	}


	/**
	* @return int number of affected rows, or false on error
	* @param string $table
	* @param string $arg
	* @desc Delete rows from a table<br />
	* <br />
	* Example:
	* <code>$sql->db_Delete("tmp", "tmp_ip='$ip'");</code><br />
	* <br />
	* @access public
	*/
	function db_Delete($table, $arg = '', $debug = FALSE, $log_type = '', $log_remark = '') 
	{
		$table = $this->db_IsLang($table);
		$this->mySQLcurTable = $table;

		if(!$this->mySQLaccess)
		{
			global $db_ConnectionID;
        	$this->mySQLaccess = $db_ConnectionID;
		}


		if (!$arg) 
		{
			if ($result = $this->mySQLresult = $this->db_Query('DELETE FROM '.$this->mySQLPrefix.$table, NULL, 'db_Delete', $debug, $log_type, $log_remark)) 
			{
				$this->dbError('db_Delete');
				return $result;
			} 
			else 
			{
				$this->dbError("db_Delete({$arg})");
				return FALSE;
			}
		} 
		else 
		{
			if ($result = $this->mySQLresult = $this->db_Query('DELETE FROM '.$this->mySQLPrefix.$table.' WHERE '.$arg, NULL, 'db_Delete', $debug, $log_type, $log_remark)) 
			{
				$tmp = mysql_affected_rows($this->mySQLaccess);
				$this->dbError('db_Delete');
				return $tmp;
			} 
			else 
			{
				$this->dbError('db_Delete ('.$arg.')');
				return FALSE;
			}
		}
	}


	/**
	* @return unknown
	* @desc Enter description here...
	* @access private
	*/
	function db_Rows() 
	{
		$rows = $this->mySQLrows = @mysql_num_rows($this->mySQLresult);
		$this->dbError('db_Rows');
		return $rows;
	}


	/**
	* @return void
	* @param unknown $mode
	* @desc Enter description here...
	* @access private
	*/
	function db_SetErrorReporting($mode) 
	{
		$this->mySQLerror = $mode;
	}


	/**
	* @return unknown
	* @param unknown $arg
	* @desc Enter description here...
	* @access private
	*/
	function db_Select_gen($query, $debug = FALSE, $log_type = '', $log_remark = '')
	{
		$this->tabset = FALSE;
		if(strpos($query,'`#') !== FALSE)
		{
			$query = preg_replace_callback("/\s`#([\w]*?)`\W/", array($this, 'ml_check'), $query);
		}
		elseif(strpos($query,'#') !== FALSE)
		{
			$query = preg_replace_callback("/\s#([\w]*?)\W/", array($this, 'ml_check'), $query);
		}

		if (($this->mySQLresult = $this->db_Query($query, NULL, 'db_Select_gen', $debug, $log_type, $log_remark)) === TRUE)
		{	// Successful query which doesn't return a row count
			$this->dbError('db_Select_gen');
			return TRUE;
		}
		elseif ($this->mySQLresult === FALSE)
		{	// Failed query
			$this->dbError('db_Select_gen('.$query.')');
			return FALSE;
		}
		else
		{	// Successful query which does return a row count - get the count and return it
			$this->dbError('db_Select_gen');
			return $this->db_Rows();
		}
	}

	function ml_check($matches)
	{
		$table = $this->db_IsLang($matches[1]);
		if($this->tabset == false)
		{
			$this->mySQLcurTable = $table;
			$this->tabset = true;
		}
		return ' `'.$this->mySQLPrefix.$table.'`'.substr($matches[0],-1);
	}


	/**
	* @return unknown
	* @param unknown $offset
	* @desc Enter description here...
	* @access private
	*/
	function db_Fieldname($offset) 
	{
		$result = @mysql_field_name($this->mySQLresult, $offset);
		return $result;
	}


	/**
	* @return unknown
	* @desc Enter description here...
	* @access private
	*/
	function db_Field_info() 
	{
		$result = @mysql_fetch_field($this->mySQLresult);
		return $result;
	}


	/**
	* @return unknown
	* @desc Enter description here...
	* @access private
	*/
	function db_Num_fields() 
	{
		$result = @mysql_num_fields($this->mySQLresult);
		return $result;
	}

	/**
	* @return unknown
	* @param unknown $table
	* @desc Enter description here...
	* @access private
	*/
	function db_IsLang($table,$multiple=FALSE) 
	{
		global $pref, $mySQLtablelist;
		if ((!$this->mySQLlanguage || !$pref['multilanguage']) && $multiple==FALSE) 
		{
		  	return $table;
		}

		if(!$this->mySQLaccess)
		{
			global $db_ConnectionID;
        	$this->mySQLaccess = $db_ConnectionID;
		}

		if (!$mySQLtablelist) 
		{
			$tablist = mysql_list_tables($this->mySQLdefaultdb,$this->mySQLaccess);
			while (list($temp) = mysql_fetch_array($tablist)) 
			{
				$mySQLtablelist[] = $temp;
			}
		}

		$mltable = "lan_".strtolower($this->mySQLlanguage.'_'.$table);

	// ---- Find all multi-language tables.

		if($multiple == TRUE)
		{ // return an array of all matching language tables. eg [french]->e107_lan_news
			if(!is_array($table))
			{
				$table = array($table);
			}

			foreach($mySQLtablelist as $tab)
			{
 				if(stristr($tab, $this->mySQLPrefix."lan_") !== FALSE)
				{
					$tmp = explode("_",str_replace($this->mySQLPrefix."lan_","",$tab));
			   		$lng = $tmp[0];
                    foreach($table as $t)
					{
                    	if(eregi($t."$",$tab))
						{
							$lanlist[$lng][$this->mySQLPrefix.$t] = $tab;
						}
					}
			  	}
			}
			return ($lanlist) ? $lanlist : FALSE;
		}
	// -------------------------

		if (in_array($this->mySQLPrefix.$mltable, $mySQLtablelist)) 
		{
			return $mltable;
		}
	 	return $table;
	}

	/**
	* @return array
	* @param string fields to retrieve
	* @desc returns fields as structured array
	* @access public
	*/
	function db_getList($fields = 'ALL', $amount = FALSE, $maximum = FALSE, $ordermode=FALSE) 
	{
		$list = array();
		$counter = 1;
		while ($row = $this->db_Fetch()) 
		{
			foreach($row as $key => $value) 
			{
				if (is_string($key)) 
				{
					if (strtoupper($fields) == 'ALL' || in_array ($key, $fields)) 
					{
						if(!$ordermode)
						{
							$list[$counter][$key] = $value;
						}
						else
						{
							$list[$row[$ordermode]][$key] = $value;
						}
					}
				}
			}
			if ($amount && $amount == $counter || ($maximum && $counter > $maximum)) 
			{
				break;
			}
			$counter++;
		}
		return $list;
	}

	/**
	* @return integer
	* @desc returns total number of queries made so far
	* @access public
	*/
	function db_QueryCount() 
	{
		global $db_mySQLQueryCount;
		return $db_mySQLQueryCount;
	}


    /*
    	Multi-language Query Function.
	*/
	function db_Query_all($query,$debug="")
	{
        $error = "";

		$query = str_replace("#",$this->mySQLPrefix,$query);

        if(!$this->db_Query($query))
		{  // run query on the default language first.
        	$error .= $query. " failed";
		}

        $tmp = explode(" ",$query);
      	foreach($tmp as $val)
		{
   			if(strpos($val,$this->mySQLPrefix) !== FALSE)
			{
    			$table[] = str_replace($this->mySQLPrefix,"",$val);
				$search[] = $val;
			}
		}

     // Loop thru relevant language tables and replace each tablename within the query.
        if($tablist = $this->db_IsLang($table,TRUE))
		{
			foreach($tablist as $key=>$tab)
			{
				$querylan = $query;
                foreach($search as $find)
				{
                    $lang = $key;
					$replace = ($tab[$find] !="") ? $tab[$find] : $find;
               	  	$querylan = str_replace($find,$replace,$querylan);
				}

				if(!$this->db_Query($querylan))
				{ // run query on other language tables.
					$error .= $querylan." failed for language";
				}
			 	if($debug){ echo "<br />** lang= ".$querylan; }
			}
		}


		return ($error)? FALSE : TRUE;
	}


	// Determines if a plugin field (and key) exist. OR if fieldid is numeric - return the field name in that position.
	// If $retinfo is true, returns complete array of field data; FALSE if not found
    function db_Field($table,$fieldid="",$key="", $retinfo = FALSE)
	{
		if(!$this->mySQLdefaultdb)
		{
			global $mySQLdefaultdb;
			$this->mySQLdefaultdb = $mySQLdefaultdb;
		}
		$convert = array("PRIMARY"=>"PRI","INDEX"=>"MUL","UNIQUE"=>"UNI");
		$key = ($convert[$key]) ? $convert[$key] : "OFF";

		if(!$this->mySQLaccess)
		{
			global $db_ConnectionID;
			$this->mySQLaccess = $db_ConnectionID;
		}

        $result = mysql_query("SHOW COLUMNS FROM ".$this->mySQLPrefix.$table,$this->mySQLaccess);
        if (mysql_num_rows($result) > 0)
		{
			$c=0;
			while ($row = mysql_fetch_assoc($result))
			{
				if(is_numeric($fieldid))
				{
					if($c == $fieldid)
					{
						if ($retinfo) return $row;
						return $row['Field']; // field number matches.
					}
				}
				else
				{	// Check for match of key name - and allow that key might not be used
					if(($fieldid == $row['Field']) && (($key == "OFF") || ($key == $row['Key'])))
					{
						if ($retinfo) return $row;
						return TRUE;
					}
				}
				$c++;
			}
		}
		return FALSE;
	}


	/**
	 * A pointer to mysql_real_escape_string() - see http://www.php.net/mysql_real_escape_string
	 *
	 * @param string $data
	 * @return string
	 */
	function escape($data, $strip = true)
	{
		if ($strip)
		{
			$data = strip_if_magic($data);
		}

		if(!$this->mySQLaccess)
		{
			global $db_ConnectionID;
        	$this->mySQLaccess = $db_ConnectionID;
		}

		return mysql_real_escape_string($data,$this->mySQLaccess);
	}


	/*
	 * Verify whether a table exists, without causing an error
	 *
	 * @param string $table
	 * @return string
	 *
	 * NOTES: the 'official' way to do this uses SHOW TABLE STATUS, but that is 20x slower!
	 *        LIMIT 0 is 3x slower than LIMIT 1
	 */
	function db_Table_exists($table)
	{
		$res = $this->db_Query("SELECT 1 FROM ".$this->mySQLPrefix.$table." LIMIT 1"); // error if not there
		if ($res) return TRUE;
		return FALSE;
	}


	/**
	* @return text string relating to error (empty string if no error)
	* @param unknown $from
	* @desc Calling method from within this class
	* @access private
	*/
	function dbError($from) 
	{
		$this->mySQLlastErrNum = mysql_errno();
		$this->mySQLlastErrText = '';
		if ($this->mySQLlastErrNum == 0)
		{
			return '';
		}
		$this->mySQLlastErrText = mysql_error();		// Get the error text.
		if ($this->mySQLerror == TRUE) 
		{
			message_handler('ADMIN_MESSAGE', '<b>mySQL Error!</b> Function: '.$from.'. ['.$this->mySQLlastErrNum.' - '.$this->mySQLlastErrText.']', __LINE__, __FILE__);
		}
		return $this->mySQLlastErrText;
	}


	// Return error number for last operation
	function getLastErrorNumber()
	{
		return $this->mySQLlastErrNum;		// Number of last error
	}

	// Return error text for last operation
	function getLastErrorText()
	{
		return $this->mySQLlastErrText;		// Text of last error (empty string if no error)
	}
}

?>