qwewqewqe

<?php
if(defined("include_banco_class") === false){
	define("include_banco_class", true);
	define("HOST", 0);
	define("USER", 1);
	define("PASS", 2);
	define("DB", 3);
	class banco{
		private $con = null;
		private $host = null;
		private $user = null;
		private $pass = null;
		private $db = null;

		public function __construct($host = null, $user = null, $pass = null, $db = null){
			if($host === null or $user === null or $pass === null or $db === null){
				$this->host = "localhost";
				$this->user = "root";
				$this->pass = "";
				$this->db = "lnd";
			}
			else{
				$this->host = $host;
				$this->user = $user;
				$this->pass = $pass;
				$this->db = $db;
			}
			return true;
		}

		public function SetVar($val, $type){
			switch(intval($type)){
				case HOST:{
					$this->host = $val;
					return true;
				}
				case USER:{
					$this->user = $val;
					return true;
				}
				case PASS:{
					$this->pass = $val;
					return true;
				}
				case DB:{
					$this->db = $val;
					return true;
				}
				default:{
					return false;
				}
			}
			return false;
		}
		public function connect(){
			if($this->host === null or $this->user === null or $this->pass === null or $this->db === null){
				return false;
			}
			if($this->con !== null){
				return false;
			}
			$this->con = new mysqli($this->host, $this->user, $this->pass, $this->db);
			if($this->con->connect_error){
				echo utf8_encode("Erro ao se conectar ao banco de dados:<br/>".$this->con->connect_errno."<br/>".$this->con->connect_error);
				$this->con = null;
				return false;
			}
			return true;
		}
		public function connected(){
			if($this->con === null || $this->con === false){
				return false;
			}
			return true;
		}
		public function query($query){
			if($this->con === null || $this->con === false){
				return false;
			}
			return $this->con->query($query);
		}
		public function insert_id(){
			if($this->con === null || $this->con === false){
				return 0;
			}
			return $this->con->insert_id;
		}
		public function real_escape_string($string){
			if($this->con === null || $this->con === false){
				return null;
			}
			return $this->con->real_escape_string($string);
		}
		public function affected_rows(){
			if($this->con === null || $this->con === false){
				return 0;
			}
			return $this->con->affected_rows;
		}
		public function error(){
			if($this->con === null || $this->con === false){
				return null;
			}
			return $this->con->error;
		}
		public function close(){
			if($this->con === null){
				return false;
			}
			$this->con->close();
			$this->con = null;
			return true;
		}
		public function __destruct(){
			$this->close();
		}
	}
}
?>