Tiny MySQL connection class

class.connection.php

<?php 
/**
* 
*/
class Connection
{
	private $result;
	private $db 			= array(
									'write' => array(
											'host' 		=> 'localhost',
											'user' 		=> '',
											'pass' 		=> '',
											'database' 	=> 'voip'
										),
									'read'	=> array(
											'host' 		=> 'localhost',
											'user' 		=> '',
											'pass' 		=> '',
											'database' 	=> 'voip'
										)
								);
	protected $show_querys 	= FALSE;
	protected $show_error	= FALSE;
	protected $link 		= array();
	protected $insert_id;
	protected $affected_rows;
	protected $total_rows;
	protected $status 		= array();

	public function __construct()
	{
		foreach ($this->db as $key => $value) {
			$this->connect($key);
		}
	}

	private function check_active($group)
	{
		if(! array_key_exists($group, $this->db)){
			$message = "Connection group $group does not exists";
			if($this->show_error){
				die($message);
			}else{
				$this->status[$group] = $message;
			}
			return FALSE;
		}else{
			return TRUE;
		}
	}

	private function error($msg, $group)
	{
		if($this->show_error){
			die($msg);
		}else{
			$this->status[$group][] = $msg;
		}
	}

	protected function connect($group)
	{
		$this->check_active($group);
		$this->link[$group] = @mysql_connect($this->db[$group]['host'], $this->db[$group]['user'], $this->db[$group]['pass']);
		if(! $this->link[$group]){
			$message = 'Could not connect: ' . mysql_error();
			$this->error($message, $group);
		}
		
		if(! @mysql_select_db($this->db[$group]['database'], $this->link[$group])){
			$message = 'Could not select database '.$this->db[$group]['database'];
			$this->error($message, $group);
			$this->close($group);
		}
	
	}

	public function query($str_sql, $group = 'read')
	{
		if(! empty($str_sql)){
			$this->check_active($group);
			$this->result = mysql_query($str_sql, $this->link[$group]);
			if(! $this->result){
				$message = "Query error: ".mysql_errno();
				$this->error($message, $group);
				if($this->show_querys){
					echo $str_sql;
				}
			}
			$this->total_rows = mysql_num_rows($this->result);
			return array($this->result, $this->total_rows, FALSE);
		}else{
			return FALSE;
		}
	}

	public function update($str_sql, $group = 'write')
	{
		if(! empty($str_sql)){
			$this->check_active($group);
			$this->result = mysql_query($str_sql, $this->link[$group]);
			if(! $this->result){
				$message = "Query error: ".mysql_errno();
				$this->error($message, $group);
				if($this->show_querys){
					echo $str_sql;
				}
			}
			$this->affected_rows = mysql_affected_rows($this->link[$group]);
			$this->insert_id = mysql_insert_id($this->link[$group]);
			return array(FALSE, $this->affected_rows, $this->insert_id);
		}else{
			return FALSE;
		}
	}

	public function close($group = '')
	{
		if(! empty($group) && $this->check_active($group)){
			@mysql_close($this->link[$group]);
		}else{
			foreach ($this->db as $key => $value) {
				@mysql_close($this->link[$key]);
			}
		}
	}

	public function set_show_errors($value = FALSE)
	{
		$this->show_error = ($value == TRUE) ? TRUE:FALSE;
	}

	public function set_show_querys($value = FALSE)
	{
		$this->show_querys = ($value == TRUE) ? TRUE:FALSE;
	}

	public function check_status()
	{		
		foreach ($this->status as $log) {
			foreach ($log as $txt) {
				echo $txt."<br>";
			}
		}
	}
}
?>