class DB  {      static $link;      static $count = 0;            public static function connect()      {// @TODO Change the data connection          @self::$link = mysqli_connect('localhost', '', '', '')                         or die('No connect (' . mysqli_connect_errno() . ') '                                               . mysqli_connect_error());       // @TODO Change the encoding             mysqli_set_charset(self::$link, 'utf8');         }              public static function escape($data)         {          if(is_array($data))              $data = array_map('self::escape', $data);          else                           $data = mysqli_real_escape_string(self::$link, $data);                    return $data;      }                       public static function Query($sql, $print = false)      {          self::$count++;                    $result = mysqli_query(self::$link, $sql);  // @TODO Remove the following lines when in production mode  // ..............................................               if($result === false || $print === 1)          {              $error =  mysqli_error(self::$link);              $trace =  debug_backtrace();              $out   = array(1 => '');                            if(!empty($error))                  preg_match("#'(.+?)'#is", $error, $out);                          $head = $error ? '<b style="color:red">MySQL error: </b><br>              <b style="color:green">'. $error .'</b><br><br>':NULL;                               $error_log = date("Y-m-d h:i:s") .' '. $head .'              <b>Query: </b><br>              <pre><span style="color:#990099">'              . str_replace($out[1], '<b style="color:red">'. $out[1] .'</b>', $trace[0]['args'][0])              .'</pre></span><br><br>              <b>File: </b><b style="color:#660099">'. $trace[0]['file'] .'</b><br>              <b>Line: </b><b style="color:#660099">'. $trace[0]['line'] .'</b>';              die($error_log);          }          else  // ..............................................              return $result;      }             static public function result($res, $row, $column = 0)      {          $i = 0;                    while($data = mysqli_fetch_array($res, MYSQLI_BOTH))          {              if($row == $i++)                  return $data[$column];          }      }            function deprecated($function)      {         $trace =  debug_backtrace();               exit('<strong style="color:red">Fatal error:</strong><br>'             .'Function <a href="http://php.net/'. $function .'">'. $function .'</a>'             .' is deprecated and has no analog in <br>'             .'<strong>'. $trace[0]['file'] .'</strong>'                        .' on line <strong>'. $trace[0]['line'] .'</strong>'             );      }     }        DB::connect();