Safely evaluate math expressions.
The EvalMath empowers safe evaluation of mathematical expressions originating from potentially untrusted sources.
It supports built-in and user-defined functions and variables, offering flexibility for complex mathematical operations.
# Create a base instance (default precision is set to 6 digits after the decimal point)
$em = new EvalMath;
# Create a base instance with the precision parameter set to 2 digits after the decimal point
$em = new EvalMath(2);
# Basic evaluation:
$result = $em->evaluate('2+2');
# Supports: order of operation; parentheses; negation; built-in functions
$result = $em->evaluate('-8(5/2)^2*(1-sqrt(4))-8');
# Create your own variables
$em->evaluate('a = e^(ln(pi))');
# or functions
$em->evaluate('f(x,y) = x^2 + y^2 - 2x*y + 1');
# and then use them
$result = $em->evaluate('3*f(42,a)');| Method | Description |
|---|---|
$em->evaluate($expression) |
Evaluates the expression and returns the result |
$em->e($expression) |
A synonym for $m->evaluate($expression) |
$em->getUserVariables() |
Returns an associative array of all user-defined variables and values |
$em->getUserFunctions() |
Returns an array of all user-defined functions |
This is a heavily refactored version of EvalMath, originally by Daniel Bojdo, which is based on Miles Kaufmann's EvalMath class.
This project is licensed under the BSD 3-Clause License. The full text of the license can be found in the LICENSE file.