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PHP延迟静态绑定示例分享_php技巧

时间:2021-07-01 10:21:17 帮助过:3人阅读

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

// 
输出结果 B C 456789 abcdef A 123456

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