Precision Maths
This module provides various classes for performing precision mathematics using BC MATH internally, (*1)
See http://php.net/manual/en/book.bc.php for more information on the BC Math Extension, (*2)
Licence
This library is copyright 2014, 2015 Switch Systems Ltd and is licenced under the Mozilla Public License 2.0., (*3)
Number Class
The precision number class provides all the basic math operations provides by the BC Math extension, (*4)
Numbers are immutable and will always return a new object with the value of the operation., (*5)
Example:, (*6)
$number = new Number('20'); // Instatiates Number object with a value of 20
$result = $number->add('20'); // returns a new instance of Number with a value of 40
echo $result; // prints '40'
Number Collection Class
The number collection can be instatiated with an array as the first argument. It has various methods for performing basic math operations on the set, (*7)
- Mean
- Median
- Standard Deviation
- Range
Example:, (*8)
$numberCollection = new NumberCollection(['1', '2', '3']);
$mean = $numberCollection->mean(); // returns a new instance of number set to the value of the mean of the set
echo $mean; // prints '2'
Tax Utility
This utility class can be instatiated to perform basic tax operations. It takes tax rate as the first argument of the constructor, (*9)
Methods:
fetchValueOfTaxToBeAdded
Returns the value of tax that would be added:, (*10)
$vatUtil = new TaxUtility('20');
$vat = $vatUtil->fetchValueOfTaxToBeAdded('125'); // Returns instance of number set to '25'
echo $vat // prints '25'
fetchValueOfAddedTax
Returns the value of tax that would be added:, (*11)
$vatUtil = new TaxUtility('20');
$vat = $vatUtil->fetchValueOfAddedTax('150'); // Returns instance of number set to '25'
echo $vat // prints '25'
addTaxTo
Returns the value of tax that would be added:, (*12)
$vatUtil = new TaxUtility('20');
$priceWithVat = $vatUtil->addTaxTo('125'); // Returns instance of number set to '150'
echo $priceWithVat // prints '150'
removeTaxFrom
Returns the value of tax that would be added:, (*13)
$vatUtil = new TaxUtility('20');
$priceWithVatRemoved = $vatUtil->removeTaxFrom('150'); // Returns instance of number set to '125'
echo $priceWithVatRemoved // prints '125'
Finance Utility
Currently only provides one method:, (*14)
calculatePayForPeriod
$financeUtil = new FinanceUtility();
$pay = $financeUtil->calculatePayForPeriod($startDateTimeObject, $endDateTimeObject, '6.50', '30');
Decimal DateTime Utility
This class has a variety of methods for calculating time in a specified unit for a date range and various convertion methods, (*15)
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