Getter＆Setter也适合在课堂上使用？ [关闭]

Question

It is a bad way of programming, when i get access to my private/protected class members directly in the class via my getter/setter methods?

Alternative #1

<?php

class A {
    private $myVariable;

    public function getMyVariable() {
        return $this->myVariable;
    }

    public function doSomething() {
        $variable = $this->getMyVariable();
    }
}

?>

Alternative #2

<?php

class A {
    private $myVariable;

    public function doSomething() {
        $variable = $this->myVariable;
    }
}
?>

Which way do you prefer? I think the first solution is more readable in constrast to the second one. Please let me hear your opinions.

Thanks in advance.

Answer 1

Since you are determined this is not a duplicate, I will copy the points from this response relevant to this case:

• Encapsulation of behavior associated with getting or setting the property - this allows additional functionality (like validation) to be added more easily later.
• Controlling the lifetime and memory management (disposal) semantics of the property - particularly important in non-managed memory environments (like C++ or Objective-C).
• Providing a debugging interception point for when a property changes at runtime - debugging when and where a property changed to a particular value can be quite difficult without this in some languages.
• Allowing inheritors to change the semantics of how the property behaves and is exposed by overriding the getter/setter methods.