PHP Calc

The CLI calculator you never knew you needed. Also usable as a library!

Usage

CLI

Call with an expression to evaluate:

$ calc "42*atan(pi/2)"
42.163162517863

Or call without arguments to go interactive:

$ calc
~ 42*atan(pi/2)
  42.163162517863

Library

As simple as falling off a rock:

use NoccyLabs\PhpCalc\Calculator;

$calc = new Calculator();
$result = $calc->evaluate("42 * atan(pi/2)");

What it does

Supported operations:

• + addition
• - subtraction
• * multiplication
• / division
• ^ exponent/raise to power

Supported functions:

• abs
• acos
• acosh
• asin
• asin
• atan
• atanh
• ceil
• cos
• cosh
• floor
• sin
• sinh
• log
• round
• sqrt
• tan
• tanh

Constants:

• pi

Useful tips

• You can set the precision using the _p variable. If the expression is passed on the command line, prepend the variable followed by a semicolon, such as _p=2;pi for the result 3.14.

Bugs and known issues

• Negative numbers and subtraction should be surrounded by whitespace to parse properly. Passing 2-1 will result in 2 and -1, returning 2 and a warning. Passing 2 - 1 will return 1 as expected, as will 2- 1.