Prior to PHP V5.3.0, the method in class A might have been defined as self::who().

在PHPV5.3.0 之前，类A 中的方法可能被定义为self::who()。

youdao

Prior to PHP V5.3.0, the method in class A might have been defined as self::who().

在PHPV5.3.0 之前，类A 中的方法可能被定义为self::who()。

youdao