simple request using ajax jquery code example

Example: $.ajax example

class DB {
		private $host = 'localhost';
		private $user = 'root';
		private $password = '';
		private $db_name = 'library';
		public $conn;
		public function connect() {
			$this-> conn = new mysqli($this-> host, $this-> user, $this-> password, $this-> db_name);
					
			return $this -> conn;

		
	}

}