How to use php internal functions

This article is to share with you about how to use the internal functions of php. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Php internal function, then define the function inside a function. At this time, this function can only be used within the function, not externally. The function of an internal function is to prevent external calls to the function. This kind of function is often used in object-oriented.

Sample code:

Function getVal ($N1 camera 2) {function sum ($N1 camera 2) {return $N1 camera N2;} function sub ($N1 camera N2) {return $N1 color 2;} echo sum (1Mague 2); echo sub (1Mague 2);} getVal (1Jue 2). Thank you for reading! This is the end of this article on "how to use php internal functions". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it out for more people to see!