PHP: Best way to write a Class where its functions can be added infinitely "as you go"?

Right now I have a normal class like this

class MyClass
{
   function myfunc1 () { }
   function myfunc2 () { }
}

However the filesize of MyClass is becoming large as I add more functions along the way. Everytime I use MyClass,开发者_如何学Python only selected functions will be used by each individual application.

What is the best way to minimize the filesize of MyClass? Is it advisable to separate each functions in a separate file, and just include them if they're needed? If yes, how do you implement it in terms of code?

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Infinitely growing classes generally lead to god objects, which are considered an anti-pattern in OO software development. When designing a class, first think about what this class is supposed to do for you, then you can design it's interface (aka public methods). If you have a good design, it's unlikely your class grows by much later on. If it does, it's time for a refactorization and breaking the class into smaller pieces.

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You want to split functionality up in different classes and files. For example, have 1 file per class, and have a single class have a clear purpose instead of one big god class.

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You probably shouldn't use several files for the same class. If the class is getting to big to manage, it's likely that you should be using subclasses.