cognito / evalmath
Evaluate mathematical and logic equations
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Requires
- php: >=5.6.0
Requires (Dev)
- phpunit/phpunit: ^5.6|^7.3
This package is auto-updated.
Last update: 2024-11-15 14:07:34 UTC
README
PHP EvalMath with Logic equations
This package is a composer-aware way to add the EvalMath package by Miles Kaufmann. More information on the original at https://www.phpclasses.org/package/2695-PHP-Safely-evaluate-mathematical-expressions.html
Added to this is the ability to evaluate logic equations, as per the code by Lee Eden posted at https://www.phpclasses.org/discuss/package/2695/thread/4/
To use:
<?php
$math = new \Cognito\EvalMath\EvalMath;
// basic evaluation:
$result = $math->evaluate('2 + 2');
// supports: order of operation; parentheses; negation; built-in functions
$result = $math->evaluate('-8(5/2)^2 * (1 - sqrt(4)) - 8');
// create your own variables
$math->evaluate('a = e^(ln(pi))');
// or functions
$math->evaluate('f(x,y) = x^2 + y^2 - 2x*y + 1');
// and then use them
$result = $math->evaluate('3*f(42,a)');
// Use the equations in logic strings
$result = $math->evaluate('2 + 2 = 4'); // true
$result = $math->evaluate('2 + 2 < 4'); // false
$result = $math->evaluate('2 + 2 >= 4'); // true
// Use dates as well, they are converted to seconds from epoch
$result = $math->evaluate('date(y,m,d,h,m)');