PHP Installment Payment Calculator: Calculate the amount of installments on loans

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Version License PHP version Categories
installment-calc 1.0.0MIT/X Consortium ...5PHP 5, Finances
Description Author

This class can calculate the amount of installments on loans.

It can take as parameters the loan amount, the interest rate and the identification of the method to use to calculate the installments.

The class can returns the values related with installment payments like the total amount or the interest amount to be returned after a given number of months.

Picture of Fernando Val
  Performance   Level  
Name: Fernando Val <contact>
Classes: 5 packages by
Country: Brazil Brazil

Details

PHP 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.

Latest Stable Version Build Status PHP Composer PHPStan Codacy Badge StyleCI Total Downloads License

Requirements

  • PHP 7.3+

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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