Question

I’m trying to make to make a script to help me with my maths

example equation: y=(4*(x*2)^(2x+4))+4*x^2

For this to work, I just need it to understand that only (x*2) needs to be put to the power of (2x+4), and then to sub that back into the original equation, which of course you can just eval() an answer.

I want to calculate the values of y, when I know an x value. This WOULD be relatively easy if it weren’t for powers. I just can’t get my head round how to do them.

I know you can use pow(), but I’m trying to make a script to work with any equation. So it sort of needs to understand the syntax.

Any suggestions how to go about this?

Answer 1

For a native PHP sandbox for evaluating formulae, which works as Sjoerd’s answer describes, take a look at the evalMath class on PHPClasses.