Take a look at the eval() function.
On Fri, 13 Jul 2001, Christodoulou Demetris wrote:
> Hi list.
> I have string variables that contain mathematical expressions. These
> strings are submitted through forms.
> For example if a user inserts the following-> 1+cos(0.3)*x into a text field
> with name expression in an HTML form then
> what i get on the server is the string variable $expression whose values is
> "1+cos(0.3)*x"
>
> Is there a way to convert the string variable, $expression, into a
> mathematical expression that can be calculated?
> Thanks in advance.
> DX.
>
>
>
>
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