Class::alternativeContructor()

[chiprivers]

How do I create alternative contractor methods for my class.  Like when you create a DateTime object you can create it using an alternative time passed by a string using DateTime::createFromFormat().

 

I want to have a default constructor method but a couple of extra contractor methods that can be called when the instance is created.

[scootstah]

The methods would have to return an instance of the class.