PHP延迟静态绑定示例分享

没怎么用过这个新特性，其实也不算新啦，试试吧，现在静态类的继承很方便了

    <?php
    class A {
     protected static $def = '123456';

     public static function test() {
      echo get_class(new static);
     }

     public static function test2() {
      echo static::$def;
     }
    }

    class B extends A {
     protected static $def = '456789';
    }

    class C extends A {
     protected static $def = 'abcdef';
    }

    echo B::test();
    echo '<br>';
    echo C::test();
    echo '<br>';
    echo B::test2();
    echo '<br>';
    echo C::test2();
    echo '<br>';
    echo A::test();
    echo '<br>';
    echo A::test2();
    echo '<br>';

    // 输出结果
    B
    C
    456789
    abcdef
    A
    123456