継承とスコープ定義演算子の影響について

php

<?php

class First
{
  const test = 'first';
  protected static $_test = 'first';

  public static function getConst()
  {
    return static::test;
  }

  public static function getVar()
  {
    return static::$_test;
  }
}

class Second extends First
{
  const test = 'second';
  protected static $_test = 'second';
}

class Third extends Second
{
}

var_dump(First::getConst());
var_dump(Second::getConst());
var_dump(Third::getConst());

var_dump(First::getVar());
var_dump(Second::getVar());
var_dump(Third::getVar());

実行結果

string(5) "first"
string(6) "second"
string(6) "second"
string(5) "first"
string(6) "second"
string(6) "second"

Thirdがどういう出力になるのかが分からなかったので備忘録