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This article mainly introduces the php protected modifier modified members in the entire inheritance chain how to use, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Members modified by protected modifiers are used on the entire inheritance chain

Protected can be accessed throughout the inheritance chain

Sample code:

Class A () {protected $num = 10;} class B extends A {public function getNum () {echo $this- > $num;}} $b = new BX getNum-> getNum (); / / output 10class A () {echo $this- > $num;}} class B extends A {protected $num = 10;} $b = new B $b-> getNum (); / / output 10 Thank you for reading this article carefully. I hope the article "how to use protected modifiers in php on the whole inheritance chain" shared by the editor will be helpful to everyone. At the same time, I hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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