static:: и self:: в наследовании

<?php
class Model {
    protected static string $table = 'models';
    public static function tableSelf(): string { return self::$table; }
    public static function tableStatic(): string { return static::$table; }
    public function __toString(): string { return static::class; }
}
class User extends Model {
    protected static string $table = 'users';
}
echo User::tableSelf(), "\n";
echo User::tableStatic(), "\n";
echo new User(), "\n";