I thought that if you didn't scope a variable within a function it
was, by default, in the 'variables' scope and available outside the function
and bad things could happen.
If you didn't previously declare it with 'var' (or, as Barney observed, if it isn't an argument).
Which his why you always scope internal variable in the 'var' scope.
You can't scope a local 'var' variable - you can scope instance variables ('variables' scope) and arguments ('arguments' scope).
That's why it's so important to have local variables explicitly declared with 'var' at the top of the function:
<cfset var localVar = 0 />
<cfset var someValue = 42 />
...
<cfset localVar = someValue />You don't need to do that with instance variables (or arguments) - you can just scope-qualify them:
<cfset variables.instanceVar = arguments.someValue />
Regards, Sean
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