Form Validation - Modify Second Parameter

[eluser]Aken[/eluser]
Yes, makes sense. You're correct then, it's a variable scope issue. The $param variable is created fresh each time the callback is run, based on the info passed to it in the rule. If you call "callback_valid_address[10]", $param = 10. "callback_valid_address[15]", $param = 15. Etc...

You'll want to use a class property if you want to hold on to the value of a property throughout the class. psychoder gave a good example.