test.php

<?

class Car
{
  publc function __construct($id)
  {
    $this->id = $id;
  }

  /**
   * Get the max speed
   * 
   * @return int Returns the max speed (or FALSE if unknown)
   */
  function getMaxSpeed()
  {
    switch ($this->getType())
    {
      case 'sport':
        $max = 230;
        break;

      case '1980':
        $max = 120;
        break;

      default:
        $max = false;
    }

     mysql_query('UPDATE car SET max = '.$max.' WHERE id = '.$this->getId());

     return $max;
  }

  public function getType()
  {
    return $this->type;
  }

  public function setType()
  {
    $this->type = $type;
  }
}