README

Safely evaluate math expressions.

Description

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.

Usage

# 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)');

Methods

Credits

This is a heavily refactored version of EvalMath, originally by Daniel Bojdo, which is based on Miles Kaufmann's EvalMath class.

License

This project is licensed under the BSD 3-Clause License. The full text of the license can be found in the LICENSE file.

hinyka / evalmath

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