Convert a string formula into its result php

Question

I have a string formula which I fetch from a file :

  $text = "100*20";

I want to find a way to convert this formula into its result, for instance have the value 200. Is this possible using php?

score -1 · Accepted Answer · answered Jul 11 '13 at 16:57

-1

$expression = '100*20';
eval('$result = ('.$expression.')');
echo $result;

answered Jul 11 '13 at 16:57

Nishu Tayal

No no no. Don't direct people to use `eval` for math operations especially when there are so many solutions out there that are actually safe to use. – Jon May 23 '14 at 22:10

score -1 · Answer 2 · edited Aug 05 '16 at 15:02

-1

Make sure to investigate the security issues surrounding eval();.

As the data is from a file it may be ok, but if it is user input - don't.

edited Aug 05 '16 at 15:02

teo van kot

answered Apr 27 '14 at 08:16

Richard

1

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2 Answers2