php require_once mysql class php global db db new MySQL db- Open bookm

<?php
require_once("mysql.class.php");

global $db;
$db = new MySQL();
$db->Open("bookmarks", "localhost", "root", "", "cp1251");

class main {
	public $result;
	
	public function getCats($showCat = true, $showTab = true) {
		if ($showCat == false && $showTab == false) return false;
		else if ($showCat == true && $showTab == false) {
			$this->tbname = "bk_cat";
			$this->sortBy = "name";
			$this->listColumns = array('id', 'name');
			$this->result = $db->SelectRows($this->tbname, "", $this->listColumns, $this->sortBy);
		}
	}
	private $tbname;
	private $sortBy;
	private $listColumns = array();
	private $whereColumns = array();
}

?>