PHP class for operating MySQL database

PHP class that operates mysql database

///////////////////Database connection class//////////////////// /
class connect{
 private $host;//Host name
 private $name;//Username
 private $pass;//Password
 private $conn;//Connection handle name
 private $db;//Database handle Name
 private $dbname;//Database name

//====================================== ===============================
 function open($addr,$dbuser,$psw){//Connect to the host
 $this->host=$addr;
 $this->name=$dbuser;
 $this->pass=$psw;
 $this->conn=mysql_connect($this->host,$ this->name,$this->pass);
 }

 function opendb($database,$charset){//Connect to the database
 $this->dbname=$database;
 mysql_query("set names " .$charset);//Set the character set
 $this->db=mysql_select_db($this->dbname,$this->conn);
 }
 function close(){//Close the host connection
 mysql_close ($this->conn);
 }

//==================================== ================================

 function __construct($addr,$dbuser,$psw){
 $this ->open($addr, $dbuser, $psw);
 }

 function __toString(){
 if($this->conn){
 $msg= "User".$this->name. "Login to the host successfully.";
 }else {
 $msg= "User ".$this->name." failed to log in to the host. ";
 }
 if($this->db){
 $msg.= "Connection to ".$this->dbname." database was successful. ";
 }else{
 $msg.= "Link ".$this->dbname." Database failed. ";
 }

 return $msg;
 }
 function __call($n,$v){//Error method absorption
 return "Does not exist".$n."() method";
 }

}

/////////////////Example/////////////////////

// $db=new connect(" localhost", "root", "lijun");

// $db->opendb("message", "utf8");

// echo $db;

// $db->close ();

// $db->open("localhost","root","lijun");

// $db->opendb("message", "utf8");

/ / echo $db->ji("er");

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