Putting operators into variables?

[JeePee]

Hlo, i've been playing with building a calculator and this would be very handy in case it was possble e.g. $var1 =1; $var2=1; $calc= +; then $sum = $var1 $calc $var2;

Is there a way to pull this off? or an alternative way to get simeliar functionality?

[harmor]

functions would be a better way

and example would be

<?php

function calc($var1, $calc, $var2)
{
	if ($calc == "add")
	{	
      $return_var = $var1 + $var2;
    }
    if ($calc == "subtract")
	{	
      $return_var = $var1 - $var2;
    }


   echo $return_var;
}

echo "1 + 5 = "; calc(1, "add", 5);
echo "<br />";
echo "13 + 9 = "; calc(13, "subtract", 9);

?>

[JeePee]

i'll look into that, thanks

[bradgrafelman]

Why not just $sum = $var1 + $var2 ?