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PHP靜態推延綁定簡單示例

   PHP靜態延遲綁定簡單示例

  沒怎麼用過這個新特性,其實也不算新啦,試試吧,現在靜態類的繼承很方便了

  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 '

  ';

  echo C::test();

  echo '

  ';

  echo B::test2();

  echo '

  ';

  echo C::test2();

  echo '

  ';

  echo A::test();

  echo '

  ';

  echo A::test2();

  echo '

  ';

  // 輸出結果

  B

  C

  456789

  abcdef

  A

  123456

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