DownloadPHP Installment Interest and Future Value Calculator
This class can calculate interest, future value, and monthly installment for a
principal value with an interest rate for a given number of months.
Requirements
Instalation
To get the latest stable version of this component use:
"require": {
"springy-framework/installment-calc": "*"
}
in your composer.json file.
Usage
I suppose that the following example is all you need:
<?php
require 'vendor/autoload.php'; // If you're using Composer (recommended)
// Creates the object. Only the principal value is requered in constructor.
$installment = new Springy\InstallmentCalc(
1000,
0.5,
Springy\InstallmentCalc::FORMULA_COMPOUND
);
/*
Interst formula constants explained
Springy\InstallmentCalc::FORMULA_SIMPLE - Simple interest
Springy\InstallmentCalc::FORMULA_COMPOUND - Compound interest
Springy\InstallmentCalc::FORMULA_BCB - Brazilian Central Bank interset formula
*/
// Gets future amount for 12 months
echo $installment->getFutureAmount(12);
// Gets total interest for 12 months
echo $installment->getInterest(12);
// Gets monthly installment for 12 months
echo $installment->getMonthlyInstallment(12);
// Gets current principal amount
echo $installment->getPrincipalAmount();
// Gets current interest formula method
echo $installment->getFormulaMethod();
// Gets current interes rate
echo $installment->getInterestRate();
// Changes the principal amount value
$installment->setPrincipalAmount(1999.99);
// Changes the interest formula value
$installment->setFormulaMethod(Springy\InstallmentCalc::FORMULA_SIMPLE);
// Changes the interest rate value
$installment->setInteresRate(1.99);
Contributing
Please read our contributing document and thank you for
doing that.
Code of Conduct
In order to ensure that our community is welcoming to all, please review and
abide by the code of conduct.
License
This project is licensed under The MIT License (MIT).
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