README

^{A library for calculating tax in PHP}

Compatibility and dependencies

This library is compatible with PHP version 5.6, 7.0, 7.1, 7.2, 7.3, 7.4, 8.0 and 8.1.

This library has no dependencies.

Installation is simple using composer.

composer require kusabi/tax

Or simply add it to your composer.json file

{
    "require": {
        "kusabi/tax": "^1.0"
    }
}

Below are the latest benchmark results taken on my local machine for PHP 5.4.

benchmark	subject	mean	diff
TaxBench	benchTaxFromNet	1.026μs	0.00%
TaxBench	benchGrossFromNet	1.053μs	+2.58%
TaxBench	benchNetFromTax	1.084μs	+5.57%
TaxBench	benchGrossFromTax	1.086μs	+5.77%
TaxBench	benchTaxFromGross	1.091μs	+6.29%
TaxBench	benchNetFromGross	1.098μs	+6.94%
TaxBench	benchRateFromNetAndTax	1.228μs	+19.64%
TaxBench	benchRateFromGrossAndTax	1.275μs	+24.25%
TaxBench	benchRateFromNetAndGross	1.279μs	+24.60%

This library adds a number of functions to calculate tax.

Below you can find links to the documentation for the new features.

Function	Description
gross_from_net	Calculate the gross amount from the net amount and tax rate
gross_from_tax	Calculate the gross amount from the tax amount and tax rate
net_from_gross	Calculate the net amount from the gross amount and tax rate
net_from_tax	Calculate the net amount from the tax amount and tax rate
rate_from_gross_and_tax	Calculate the tax rate from the gross amount and tax amount
rate_from_net_and_gross	Calculate the tax rate from the net amount and gross amount
rate_from_net_and_tax	Calculate the tax rate from the net amount and tax amount
tax_from_gross	Calculate the tax amount from the gross amount and tax rate
tax_from_net	Calculate the tax amount from the net amount and tax rate