[Phpwm] Fnuction to calculate a formula

[Phil Beynon]

>
>
> Hello,
> I am on the hunt for a PHP 5 function that will calculate a given formula.
> For example:
>
> $formula="2+2";
> $result=calculate_formula($formula);
> echo "$formula = $result";
>
> Would reult in:
>
> 2+2 = 4
>
> Anyone got any ideas?
> Cheers,
> Colin
>


Colin,
are the users entering the actual formula here?

eval() is OK if internal but it needs to be ringfenced if any user input can
be directed against it.

Phil
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