Description:
------------
<?php
declare(strict_types=1);

namespace App\Traits;

/**
 * Class SanitizerHelper
 *
 * @package App\Traits
 */
trait SanitizerHelperTrait
{
    /**
     * @param array $data
     * @param array $fields
     *
     * @return array
     */
    public function decimalFormat(array $data, array $fields)
    {
        foreach ($fields as $field) {
            $value = array_get($data, $field, null);
            if ($value) {
                $value        = ((float) $value) * 100;
                $data[$field] = (int) $value;
            }
        }

        return $data;
    }
}


Test script:
---------------
<?php

namespace Tests\Unit\Traits;

use App\SanitizerHelperTrait;

/**
 * Class SanitizerHelperTest
 *
 * @package Tests\Unit\Traits
 */
class SanitizerHelperTest extends \PHPUnit_Framework_TestCase
{
    use SanitizerHelperTrait;

    /**
     * @param $data
     * @param $expected
     *
     * @covers       \App\Traits\SanitizerHelperTrait::decimalFormat()
     * @dataProvider getDecimalDataProvider
     */
    public function test_Decimal_Format($data, $expected)
    {
        static::assertEquals($expected, $this->decimalFormat($data, array_keys($data)));
    }

    public function getDecimalDataProvider()
    {
        return [
            '#1 decimal'    => [
                'data'     => [
                    'discountAmount' => 17.99,
                ],
                'expected' => [
                    'discountAmount' => 1799,
                ],
            ],
            '#2 decimal'    => [
                'data'     => [
                    'arAmount' => 10.02,
                ],
                'expected' => [
                    'arAmount' => 1002,
                ],
            ],
            '#3 decimal'    => [
                'data'     => [
                    'gotAmount' => 10.02,
                ],
                'expected' => [
                    'gotAmount' => 1002,
                ],
            ],
            '#5 No decimal' => [
                'data'     => [
                    'arAmount' => 200,
                ],
                'expected' => [
                    'arAmount' => 20000,
                ],
            ],
            '#6 Null' => [
                'data'     => [
                    'arAmount' => null,
                ],
                'expected' => [
                    'arAmount' => 0,
                ],
            ],
        ];
    }
}

Expected result:
----------------
1799

Actual result:
--------------
1798