[PHP] really bad mysql OOP example, needs to be upgraded to PDO

fail.php

<?php

class mSQL{
  
  var $host;
  var $username;
  var $password;
  var $database;
  public $dub; 

    public function connect($set_host, $set_username, $set_password, $set_database)
    {
        $this->host = $set_host;
        $this->username = $set_username;
        $this->password = $set_password;
        $this->database = $set_database;
        $this->dub = mysql_connect($this->host, $this->username, $this->password)or die("cannot connect");
        mysql_select_db($this->database)or die("cannot select DB");
    }
    
    public function safe($val)
    { 
      return mysql_real_escape_string($val);
    }
    
    public function query($sql)
    {
      return mysql_query(safe($sql),$this->dub);
    }
    
    public function fetch($sql)
    {
     return mysql_fetch_array($this->query(safe($sql)));
    }
    public function salt($protect)
    {
      $saltdate = date("Y.m.d");
      $salt = sha1(md5($saltdate));
      $result = sha1(md5($protect).$salt);
      return $result;
    }

}

$connect = new mSQL();

// Creds & Database
$connect->connect('localhost', 'user', 'pass', 'database1'); 

// Using the built-in mysql_query function with the class connection
$query = mysql_query(safe("SELECT * FROM table"), $connect->dub);
$msqlarray = mysql_fetch_array($query);

// Using query function inside the class
$query = $connect->query("SELECT * FROM table");
$msqlarray = mysql_fetch_array($query);

// Or Simply use the fetch function to return with mysql_fetch_array already.
$msqlarray = $connect->fetch("SELECT * FROM table");

echo $msqlarray['row']; 

}

?>