Mysql - Parse error (syntax error) in my code [duplicate]

Answer 1

Put your code in a class method like constructor.

class Connect_db
{

  function __construct()
  {
    $mysqli = new mysqli('localhost', 'root', '', 'cms');
  }
}

Answer 2

You can't instantiate classes when creating member variables in a class. You have to do this in the constructor or a method:

class Connect_db{
    private $mysqli;

    public function __constructor() {
        $this->mysqli = new mysqli('localhost', 'root', '', 'cms');
    }
}