是否值得在 OOP 中使用 get 和 set 方法?

I have seen some some projects in which classes are having get and set methods to manipulate insert data. Let me have an example here :

    class Student extends dbClass
{
    private $TableID;
    private $FullName;
    private $Gender;
    private $Address;




    function setTableID($Value)
    {
        $this->TableID = $Value;
    }

    function getTableID()
    {
        return $this->TableID;
    }

    function setFullName($Value)
    {
        $this->FullName = $Value;
    }

    function getFullName()
    {
        return $this->FullName;
    }

    function setGender($Value)
    {
        $this->Gender = $Value;
    }

    function getGender()
    {
        return $this->Gender;
    }

    function setAddress($Value)
    {
        $this->Address = $Value;
    }

    function getAddress()
    {
        return $this->Address;
    }


    function UpdateStudent()
    {
        $sql = "UPDATE INTO usertable SET
        FullName = '".$this->getFullName()."',
        Gender = '".$this->getGender()."',
        Address = '".$this->getAddress()."'
        where TableID='".$this->getTableID()."'";
        $this->query($sql);
    }
}

上面是我看到的示例类.以下是他们如何使用它的过程:

$student = new Student;
$student->setTableID = 1;
$student->setFullName('My Name');
$student->setGender('Male');
$student->setAddress('this is my address');

$studen->UpdateStudent();

public function __get($name) {
    $getter = 'get'.$name;
    if (method_exists($this, $getter)) {
        return $this->$getter();
    }

    $message = sprintf('Class "%1$s" does not have a property named "%2$s" or a method named "%3$s".', get_class($this), $name, $getter);
    throw new OutOfRangeException($message);
}

public function __set($name, $value) {
    $setter = 'set'.$name;
    if (method_exists($this, $setter)) {
        return $this->$setter($value);
    }

    $getter = 'get'.$name;
    if (method_exists($this, $getter)) {
        $message = sprintf('Implicit property "%2$s" of class "%1$s" cannot be set because it is read-only.', get_class($this), $name);
    }
    else {
        $message = sprintf('Class "%1$s" does not have a property named "%2$s" or a method named "%3$s".', get_class($this), $name, $setter);
    }
    throw new OutOfRangeException($message);
}