PHP作用域限定符双冒号::的用法 方法

[php]代码库

  
<?php
class Fruit {
    const CONST_VALUE = 'Fruit Color';
}
class Apple extends Fruit
{
    public static $color = 'Red';
    public static function doubleColon() {
        echo parent::CONST_VALUE . "\n";
        echo self::$color . "\n";
    }
}
Apple::doubleColon();
?>