01
Expressions that stay readable.
Write the calculation your users already understand. Variables, familiar operators, and a focused set of math functions.
See the grammar →Scalar expressions for PHP
Math, with boundaries.
A small, predictable expression evaluator for the moments when a calculator needs to live inside your application.
PHP 8.2+ · no runtime dependencies · explicit errors
mathphp / playground ready
> (subtotal + tax) * 1.05
subtotal = 42.50 tax = 0.20
→53.55float
deterministicboundedtyped
Small surface area.Clear contracts at every edge.
Safe by default.No eval(), no hidden state.
Useful immediately.Operators, functions, variables.
Why MathPHP
02
Errors that tell the truth.
Every failure has a stable code and source span, so validation messages can be useful instead of mysterious.
Explore error codes →03
Boundaries you can trust.
Overflow, non-finite values, malformed input, and resource limits are handled explicitly and consistently.
View the limits →A tiny API
One call between input and result.
Keep the evaluator behind your own form, API, or rule editor. MathPHP does the careful part.
$result = Math::evaluate('2 * (3 + 4)');