Package Proposal: Math_RPN

Hi, I wrote a class that can make and calculate a RPN (reversed polish notation) expression. RPN is formal logic system which allowed mathematical expressions to be specified without parentheses by placing the operators before or after the operands. For example 2+5*7 in RPN looks 2,5,7,*,+ You can take a look at the source code and example here: http://www.maciek.maribex.wizja.net.pl/rpn/ Sample usage: $expression = '(3+2)*(7-sin(30)*log(10))'; require_once 'Math/RPN.php'; $rpn = new RPN(false); $value = $rpn->getValue($input); // 32.5 Any questions, comments, or suggestions? Regards, Maciek Szczytowski admin@e-rower.pl