handling a string as PHP

Question

Possible Duplicate:
PHP: Calculate a math function f(x) in a string

I have a little problem. I have a string, such that,

$a = '(2+3+4)';

How can I handle $a such that the output, echo $a should be 9 instead of just giving (2+3+4).

score 3 · Answer 1 · answered Sep 20 '11 at 07:11

3

If your code is indeed $a = (2+3+4), then echo will output 9.

It sounds like you have it a string. You could eval() that string to get the 9.

answered Sep 20 '11 at 07:11

alex

I have done eval() but it dont – gfdfg gfgg Sep 20 '11 at 07:13
3

`eval` is evil blah blah security hole blah blah... there has to be a feature where this is auto-appended to any answer that mentions the unspeakable. :) – Jon Sep 20 '11 at 07:13

score 2 · Answer 2 · answered Sep 20 '11 at 07:13

2

Have a look at php's Eval function

$string = "(2+3+4)";
eval('$a = '.$string);
echo $a;

answered Sep 20 '11 at 07:13

2 Answers2