Sey
Sey, pronounce say, is a powerful math interpreter with infinite-precision.
Installation
Requires PHP 8.0.0+ and the
bcmathextension
You can install the package via composer:
composer require felixdorn/sey
Usage
Sey::parse('(0.5 + 0.5) / 3)'); // 0.3333333333333333
// or
sey('a / b', ['a' => 1, 'b' => 2]); // 0.5
Precision
By default, the maximum floating precision is 16.
You may change it:
\Felix\Sey\Sey:precision(32);
Syntax
It's just math.
1 + 2
2 - 3
3 * 4
4 / 5
5 % 6
6 ^ 7
7 * (8 + 9)
sqrt(10)
powmod(11)
11(12 - 13)
(14 + 15)^16
!(5)
pi()
Variables
You can not define variables in your code but you can pass them at compile-time.
Sey::parse('2 * r * pi', [
'r' => 10,
'pi' => 3.1415
]);
Functions
-
sqrt:bcsqrt -
powmod:bcpowmod -
pi(): custombcpifunctionThis function returns pi with your defined precision up to 999 digits.
-
!(n): custombcfactfunctionThis computes
n!, if you need to do it really quickly, you should probably use a lookup table.
Custom functions
You can override built-ins functions.
Sey::define('!', function (int $n, /* as many arguments as you want */) {
return $factorials[$n] ?? bcfact($n);
});
The function name must match the following regex [a-z_A-Z!]+[a-z_A-Z0-9]*.
So, first character must be a letter or ! followed by any number of letters or numbers.
Tests
composer test
sey was created by Félix Dorn under the MIT license.
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