PHP Maths Equation Function -

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What I'm actually seeing is a math equation function that represents a string and takes the equation and returns For example, calculates the answer as

For example ("(4 * 5) + 6) * 2) / 8"

Output: 6.5 

  print calc ("((4 * 5) + 6) * 2) / 8");

Is there a class or a function that is creating some angels or doing what I do it myself

thanks 

  $ nums = "((4 * 5) + 6) * 2) / 8"; Eval ("\ $ nums = $ nums;"); $ X resonate;

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