note 104268 deleted from function.eval by danbrown

Note Submitter: webmaster at bestcode dot com ---- When you want the user provide a formula to interpret, eval function is dangerous to use. A malicious user can type PHP code that may do harm when executed. To overcome this security problem with eval, it is sometimes better to parse a simple mathematical expression using PHP without relying on eval function. To achieve this there is a Math Parser for PHP here: http://www.bestcode.com/html/math_parser_for_php.html bcParserPHP can parse and evaluate expressions given at runtime without using eval() PHP function for security reasons. You can have user defined functions, variables in the expressions. It supports string literals and some boolean logic in the expression as well. Here is sample code: $parser = new MathParser(); $parser->setExpression($expr); $parser->setVariable('X', 5); echo 'Result=' . $parser->getValue(); Mete