A static function inside a class gives us the ability to call the function a class without initializing the class
For example:- in the below example animal is class and lion() is a static function inside it.

 class Animal {
 public static function lion(){

}
 }

Now, as lion() is a static function it can be accessed without initialization of the class i.e. without making an object of the class.

thus to acess a static function write

animal::lion();