PHP延迟静态绑定示例分享_PHP教程

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

// 

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