result of String with signs

[alirezaok]

i have a sting with some numbers and signs like as:

$var="-25+74+14-8";

i want to get the result of content of this variable
the result of this variable is: 55

how do i do it?
thanks

[paulnaj]

I do believe that ...

$string = "-25+74+14-8";
eval('$var='.$string.';');
echo $var;

... is what you're after.

But be careful with eval(). If these strings are coming form user input, you must sanitize the string before passing it to eval(), otherwise nasty people will be able nasty things.

Paul