William wrote:

>1) Payroll apps require large tax libraries (federal, every state and
Split them into more files (diffrent states etc.) and include_once them 
when they are needed,
and perhaps mysql can take part of the job.

>4)Loosely Typed Variables.
>    I fear it might be to simple in PHP to have a dollar amount converted to
>a string and become rounded or truncated, because php's loose type.
>    This might be a smaller issue than I think? Is there a way to strictly
>enforce types/conversions so my numerics stay numerics?
The issue is with floating point numbers, I encourage you to do the 
calculations in cents and round up when needed.

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